hw/ide/ide-dev.c - third_party/qemu - Git at Google

 /*
  * IDE device functions
  *
  * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */

 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qapi/qapi-types-block.h"
 #include "qemu/error-report.h"
 #include "qemu/module.h"
 #include "hw/ide/ide-dev.h"
 #include "sysemu/block-backend.h"
 #include "sysemu/blockdev.h"
 #include "sysemu/sysemu.h"
 #include "qapi/visitor.h"
 #include "ide-internal.h"

 static Property ide_props[] = {
     DEFINE_PROP_UINT32("unit", IDEDevice, unit, -1),
     DEFINE_PROP_BOOL("win2k-install-hack", IDEDevice, win2k_install_hack, false),
     DEFINE_PROP_END_OF_LIST(),
 };

 static void ide_qdev_realize(DeviceState *qdev, Error **errp)
 {
     IDEDevice *dev = IDE_DEVICE(qdev);
     IDEDeviceClass *dc = IDE_DEVICE_GET_CLASS(dev);
     IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);

     if (dev->unit == -1) {
         dev->unit = bus->master ? 1 : 0;
     }

     if (dev->unit >= bus->max_units) {
         error_setg(errp, "Can't create IDE unit %d, bus supports only %d units",
                      dev->unit, bus->max_units);
         return;
     }

     switch (dev->unit) {
     case 0:
         if (bus->master) {
             error_setg(errp, "IDE unit %d is in use", dev->unit);
             return;
         }
         bus->master = dev;
         break;
     case 1:
         if (bus->slave) {
             error_setg(errp, "IDE unit %d is in use", dev->unit);
             return;
         }
         bus->slave = dev;
         break;
     default:
         error_setg(errp, "Invalid IDE unit %d", dev->unit);
         return;
     }
     dc->realize(dev, errp);
 }

 void ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind, Error **errp)
 {
     IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
     IDEState *s = bus->ifs + dev->unit;
     int ret;

     if (!dev->conf.blk) {
         if (kind != IDE_CD) {
             error_setg(errp, "No drive specified");
             return;
         } else {
             /* Anonymous BlockBackend for an empty drive */
             dev->conf.blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
             ret = blk_attach_dev(dev->conf.blk, &dev->qdev);
             assert(ret == 0);
         }
     }

     if (dev->conf.discard_granularity == -1) {
         dev->conf.discard_granularity = 512;
     } else if (dev->conf.discard_granularity &&
                dev->conf.discard_granularity != 512) {
         error_setg(errp, "discard_granularity must be 512 for ide");
         return;
     }

     if (!blkconf_blocksizes(&dev->conf, errp)) {
         return;
     }

     if (dev->conf.logical_block_size != 512) {
         error_setg(errp, "logical_block_size must be 512 for IDE");
         return;
     }

     if (kind != IDE_CD) {
         if (!blkconf_geometry(&dev->conf, &dev->chs_trans, 65535, 16, 255,
                               errp)) {
             return;
         }
     }
     if (!blkconf_apply_backend_options(&dev->conf, kind == IDE_CD,
                                        kind != IDE_CD, errp)) {
         return;
     }

     if (ide_init_drive(s, dev, kind, errp) < 0) {
         return;
     }

     if (!dev->version) {
         dev->version = g_strdup(s->version);
     }
     if (!dev->serial) {
         dev->serial = g_strdup(s->drive_serial_str);
     }

     add_boot_device_path(dev->conf.bootindex, &dev->qdev,
                          dev->unit ? "/disk@1" : "/disk@0");

     add_boot_device_lchs(&dev->qdev, dev->unit ? "/disk@1" : "/disk@0",
                          dev->conf.lcyls,
                          dev->conf.lheads,
                          dev->conf.lsecs);
 }

 static void ide_dev_get_bootindex(Object *obj, Visitor *v, const char *name,
                                   void *opaque, Error **errp)
 {
     IDEDevice *d = IDE_DEVICE(obj);

     visit_type_int32(v, name, &d->conf.bootindex, errp);
 }

 static void ide_dev_set_bootindex(Object *obj, Visitor *v, const char *name,
                                   void *opaque, Error **errp)
 {
     IDEDevice *d = IDE_DEVICE(obj);
     int32_t boot_index;
     Error *local_err = NULL;

     if (!visit_type_int32(v, name, &boot_index, errp)) {
         return;
     }
     /* check whether bootindex is present in fw_boot_order list  */
     check_boot_index(boot_index, &local_err);
     if (local_err) {
         goto out;
     }
     /* change bootindex to a new one */
     d->conf.bootindex = boot_index;

     if (d->unit != -1) {
         add_boot_device_path(d->conf.bootindex, &d->qdev,
                              d->unit ? "/disk@1" : "/disk@0");
     }
 out:
     error_propagate(errp, local_err);
 }

 static void ide_dev_instance_init(Object *obj)
 {
     object_property_add(obj, "bootindex", "int32",
                         ide_dev_get_bootindex,
                         ide_dev_set_bootindex, NULL, NULL);
     object_property_set_int(obj, "bootindex", -1, NULL);
 }

 static void ide_hd_realize(IDEDevice *dev, Error **errp)
 {
     ide_dev_initfn(dev, IDE_HD, errp);
 }

 static void ide_cd_realize(IDEDevice *dev, Error **errp)
 {
     ide_dev_initfn(dev, IDE_CD, errp);
 }

 static Property ide_hd_properties[] = {
     DEFINE_IDE_DEV_PROPERTIES(),
     DEFINE_BLOCK_CHS_PROPERTIES(IDEDrive, dev.conf),
     DEFINE_PROP_BIOS_CHS_TRANS("bios-chs-trans",
                 IDEDrive, dev.chs_trans, BIOS_ATA_TRANSLATION_AUTO),
     DEFINE_PROP_UINT16("rotation_rate", IDEDrive, dev.rotation_rate, 0),
     DEFINE_PROP_END_OF_LIST(),
 };

 static void ide_hd_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);

     k->realize  = ide_hd_realize;
     dc->fw_name = "drive";
     dc->desc    = "virtual IDE disk";
     device_class_set_props(dc, ide_hd_properties);
 }

 static const TypeInfo ide_hd_info = {
     .name          = "ide-hd",
     .parent        = TYPE_IDE_DEVICE,
     .instance_size = sizeof(IDEDrive),
     .class_init    = ide_hd_class_init,
 };

 static Property ide_cd_properties[] = {
     DEFINE_IDE_DEV_PROPERTIES(),
     DEFINE_PROP_END_OF_LIST(),
 };

 static void ide_cd_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);

     k->realize  = ide_cd_realize;
     dc->fw_name = "drive";
     dc->desc    = "virtual IDE CD-ROM";
     device_class_set_props(dc, ide_cd_properties);
 }

 static const TypeInfo ide_cd_info = {
     .name          = "ide-cd",
     .parent        = TYPE_IDE_DEVICE,
     .instance_size = sizeof(IDEDrive),
     .class_init    = ide_cd_class_init,
 };

 static void ide_device_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *k = DEVICE_CLASS(klass);
     k->realize = ide_qdev_realize;
     set_bit(DEVICE_CATEGORY_STORAGE, k->categories);
     k->bus_type = TYPE_IDE_BUS;
     device_class_set_props(k, ide_props);
 }

 static const TypeInfo ide_device_type_info = {
     .name = TYPE_IDE_DEVICE,
     .parent = TYPE_DEVICE,
     .instance_size = sizeof(IDEDevice),
     .abstract = true,
     .class_size = sizeof(IDEDeviceClass),
     .class_init = ide_device_class_init,
     .instance_init = ide_dev_instance_init,
 };

 static void ide_register_types(void)
 {
     type_register_static(&ide_hd_info);
     type_register_static(&ide_cd_info);
     type_register_static(&ide_device_type_info);
 }

 type_init(ide_register_types)
	/*
	* IDE device functions
	*
	* Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	*/

	#include "qemu/osdep.h"
	#include "qapi/error.h"
	#include "qapi/qapi-types-block.h"
	#include "qemu/error-report.h"
	#include "qemu/module.h"
	#include "hw/ide/ide-dev.h"
	#include "sysemu/block-backend.h"
	#include "sysemu/blockdev.h"
	#include "sysemu/sysemu.h"
	#include "qapi/visitor.h"
	#include "ide-internal.h"

	static Property ide_props[] = {
	DEFINE_PROP_UINT32("unit", IDEDevice, unit, -1),
	DEFINE_PROP_BOOL("win2k-install-hack", IDEDevice, win2k_install_hack, false),
	DEFINE_PROP_END_OF_LIST(),
	};

	static void ide_qdev_realize(DeviceState qdev, Error *errp)
	{
	IDEDevice *dev = IDE_DEVICE(qdev);
	IDEDeviceClass *dc = IDE_DEVICE_GET_CLASS(dev);
	IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);

	if (dev->unit == -1) {
	dev->unit = bus->master ? 1 : 0;
	}

	if (dev->unit >= bus->max_units) {
	error_setg(errp, "Can't create IDE unit %d, bus supports only %d units",
	dev->unit, bus->max_units);
	return;
	}

	switch (dev->unit) {
	case 0:
	if (bus->master) {
	error_setg(errp, "IDE unit %d is in use", dev->unit);
	return;
	}
	bus->master = dev;
	break;
	case 1:
	if (bus->slave) {
	error_setg(errp, "IDE unit %d is in use", dev->unit);
	return;
	}
	bus->slave = dev;
	break;
	default:
	error_setg(errp, "Invalid IDE unit %d", dev->unit);
	return;
	}
	dc->realize(dev, errp);
	}

	void ide_dev_initfn(IDEDevice dev, IDEDriveKind kind, Error *errp)
	{
	IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
	IDEState *s = bus->ifs + dev->unit;
	int ret;

	if (!dev->conf.blk) {
	if (kind != IDE_CD) {
	error_setg(errp, "No drive specified");
	return;
	} else {
	/* Anonymous BlockBackend for an empty drive */
	dev->conf.blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
	ret = blk_attach_dev(dev->conf.blk, &dev->qdev);
	assert(ret == 0);
	}
	}

	if (dev->conf.discard_granularity == -1) {
	dev->conf.discard_granularity = 512;
	} else if (dev->conf.discard_granularity &&
	dev->conf.discard_granularity != 512) {
	error_setg(errp, "discard_granularity must be 512 for ide");
	return;
	}

	if (!blkconf_blocksizes(&dev->conf, errp)) {
	return;
	}

	if (dev->conf.logical_block_size != 512) {
	error_setg(errp, "logical_block_size must be 512 for IDE");
	return;
	}

	if (kind != IDE_CD) {
	if (!blkconf_geometry(&dev->conf, &dev->chs_trans, 65535, 16, 255,
	errp)) {
	return;
	}
	}
	if (!blkconf_apply_backend_options(&dev->conf, kind == IDE_CD,
	kind != IDE_CD, errp)) {
	return;
	}

	if (ide_init_drive(s, dev, kind, errp) < 0) {
	return;
	}

	if (!dev->version) {
	dev->version = g_strdup(s->version);
	}
	if (!dev->serial) {
	dev->serial = g_strdup(s->drive_serial_str);
	}

	add_boot_device_path(dev->conf.bootindex, &dev->qdev,
	dev->unit ? "/disk@1" : "/disk@0");

	add_boot_device_lchs(&dev->qdev, dev->unit ? "/disk@1" : "/disk@0",
	dev->conf.lcyls,
	dev->conf.lheads,
	dev->conf.lsecs);
	}

	static void ide_dev_get_bootindex(Object obj, Visitor v, const char *name,
	void opaque, Error *errp)
	{
	IDEDevice *d = IDE_DEVICE(obj);

	visit_type_int32(v, name, &d->conf.bootindex, errp);
	}

	static void ide_dev_set_bootindex(Object obj, Visitor v, const char *name,
	void opaque, Error *errp)
	{
	IDEDevice *d = IDE_DEVICE(obj);
	int32_t boot_index;
	Error *local_err = NULL;

	if (!visit_type_int32(v, name, &boot_index, errp)) {
	return;
	}
	/* check whether bootindex is present in fw_boot_order list */
	check_boot_index(boot_index, &local_err);
	if (local_err) {
	goto out;
	}
	/* change bootindex to a new one */
	d->conf.bootindex = boot_index;

	if (d->unit != -1) {
	add_boot_device_path(d->conf.bootindex, &d->qdev,
	d->unit ? "/disk@1" : "/disk@0");
	}
	out:
	error_propagate(errp, local_err);
	}

	static void ide_dev_instance_init(Object *obj)
	{
	object_property_add(obj, "bootindex", "int32",
	ide_dev_get_bootindex,
	ide_dev_set_bootindex, NULL, NULL);
	object_property_set_int(obj, "bootindex", -1, NULL);
	}

	static void ide_hd_realize(IDEDevice dev, Error *errp)
	{
	ide_dev_initfn(dev, IDE_HD, errp);
	}

	static void ide_cd_realize(IDEDevice dev, Error *errp)
	{
	ide_dev_initfn(dev, IDE_CD, errp);
	}

	static Property ide_hd_properties[] = {
	DEFINE_IDE_DEV_PROPERTIES(),
	DEFINE_BLOCK_CHS_PROPERTIES(IDEDrive, dev.conf),
	DEFINE_PROP_BIOS_CHS_TRANS("bios-chs-trans",
	IDEDrive, dev.chs_trans, BIOS_ATA_TRANSLATION_AUTO),
	DEFINE_PROP_UINT16("rotation_rate", IDEDrive, dev.rotation_rate, 0),
	DEFINE_PROP_END_OF_LIST(),
	};

	static void ide_hd_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);

	k->realize = ide_hd_realize;
	dc->fw_name = "drive";
	dc->desc = "virtual IDE disk";
	device_class_set_props(dc, ide_hd_properties);
	}

	static const TypeInfo ide_hd_info = {
	.name = "ide-hd",
	.parent = TYPE_IDE_DEVICE,
	.instance_size = sizeof(IDEDrive),
	.class_init = ide_hd_class_init,
	};

	static Property ide_cd_properties[] = {
	DEFINE_IDE_DEV_PROPERTIES(),
	DEFINE_PROP_END_OF_LIST(),
	};

	static void ide_cd_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);

	k->realize = ide_cd_realize;
	dc->fw_name = "drive";
	dc->desc = "virtual IDE CD-ROM";
	device_class_set_props(dc, ide_cd_properties);
	}

	static const TypeInfo ide_cd_info = {
	.name = "ide-cd",
	.parent = TYPE_IDE_DEVICE,
	.instance_size = sizeof(IDEDrive),
	.class_init = ide_cd_class_init,
	};

	static void ide_device_class_init(ObjectClass klass, void data)
	{
	DeviceClass *k = DEVICE_CLASS(klass);
	k->realize = ide_qdev_realize;
	set_bit(DEVICE_CATEGORY_STORAGE, k->categories);
	k->bus_type = TYPE_IDE_BUS;
	device_class_set_props(k, ide_props);
	}

	static const TypeInfo ide_device_type_info = {
	.name = TYPE_IDE_DEVICE,
	.parent = TYPE_DEVICE,
	.instance_size = sizeof(IDEDevice),
	.abstract = true,
	.class_size = sizeof(IDEDeviceClass),
	.class_init = ide_device_class_init,
	.instance_init = ide_dev_instance_init,
	};

	static void ide_register_types(void)
	{
	type_register_static(&ide_hd_info);
	type_register_static(&ide_cd_info);
	type_register_static(&ide_device_type_info);
	}

	type_init(ide_register_types)