io: get rid of bounce buffering in websock write path
[qemu/ar7.git] / hw / ide / qdev.c
blobd60ac25be0ed98e7dd1814e61b92ec89eb290390
1 /*
2 * ide bus support for qdev.
4 * Copyright (c) 2009 Gerd Hoffmann <kraxel@redhat.com>
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.
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.
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/>.
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"
31 /* --------------------------------- */
33 static char *idebus_get_fw_dev_path(DeviceState *dev);
34 static void idebus_unrealize(BusState *qdev, Error **errp);
36 static Property ide_props[] = {
37 DEFINE_PROP_UINT32("unit", IDEDevice, unit, -1),
38 DEFINE_PROP_END_OF_LIST(),
41 static void ide_bus_class_init(ObjectClass *klass, void *data)
43 BusClass *k = BUS_CLASS(klass);
45 k->get_fw_dev_path = idebus_get_fw_dev_path;
46 k->unrealize = idebus_unrealize;
49 static void idebus_unrealize(BusState *bus, Error **errp)
51 IDEBus *ibus = IDE_BUS(bus);
53 if (ibus->vmstate) {
54 qemu_del_vm_change_state_handler(ibus->vmstate);
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,
65 void ide_bus_new(IDEBus *idebus, size_t idebus_size, DeviceState *dev,
66 int bus_id, int max_units)
68 qbus_create_inplace(idebus, idebus_size, TYPE_IDE_BUS, dev, NULL);
69 idebus->bus_id = bus_id;
70 idebus->max_units = max_units;
73 static char *idebus_get_fw_dev_path(DeviceState *dev)
75 char path[30];
77 snprintf(path, sizeof(path), "%s@%x", qdev_fw_name(dev),
78 ((IDEBus*)dev->parent_bus)->bus_id);
80 return g_strdup(path);
83 static void ide_qdev_realize(DeviceState *qdev, Error **errp)
85 IDEDevice *dev = IDE_DEVICE(qdev);
86 IDEDeviceClass *dc = IDE_DEVICE_GET_CLASS(dev);
87 IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
89 if (dev->unit == -1) {
90 dev->unit = bus->master ? 1 : 0;
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;
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;
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;
112 bus->slave = dev;
113 break;
114 default:
115 error_setg(errp, "Invalid IDE unit %d", dev->unit);
116 return;
118 dc->realize(dev, errp);
121 IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
123 DeviceState *dev;
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);
133 int ide_get_geometry(BusState *bus, int unit,
134 int16_t *cyls, int8_t *heads, int8_t *secs)
136 IDEState *s = &DO_UPCAST(IDEBus, qbus, bus)->ifs[unit];
138 if (s->drive_kind != IDE_HD || !s->blk) {
139 return -1;
142 *cyls = s->cylinders;
143 *heads = s->heads;
144 *secs = s->sectors;
145 return 0;
148 int ide_get_bios_chs_trans(BusState *bus, int unit)
150 return DO_UPCAST(IDEBus, qbus, bus)->ifs[unit].chs_trans;
153 /* --------------------------------- */
155 typedef struct IDEDrive {
156 IDEDevice dev;
157 } IDEDrive;
159 static void ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind, Error **errp)
161 IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
162 IDEState *s = bus->ifs + dev->unit;
163 Error *err = NULL;
164 int ret;
166 if (!dev->conf.blk) {
167 if (kind != IDE_CD) {
168 error_setg(errp, "No drive specified");
169 return;
170 } else {
171 /* Anonymous BlockBackend for an empty drive */
172 dev->conf.blk = blk_new(0, BLK_PERM_ALL);
173 ret = blk_attach_dev(dev->conf.blk, &dev->qdev);
174 assert(ret == 0);
178 if (dev->conf.discard_granularity == -1) {
179 dev->conf.discard_granularity = 512;
180 } else if (dev->conf.discard_granularity &&
181 dev->conf.discard_granularity != 512) {
182 error_setg(errp, "discard_granularity must be 512 for ide");
183 return;
186 blkconf_blocksizes(&dev->conf);
187 if (dev->conf.logical_block_size != 512) {
188 error_setg(errp, "logical_block_size must be 512 for IDE");
189 return;
192 blkconf_serial(&dev->conf, &dev->serial);
193 if (kind != IDE_CD) {
194 blkconf_geometry(&dev->conf, &dev->chs_trans, 65535, 16, 255, &err);
195 if (err) {
196 error_propagate(errp, err);
197 return;
200 blkconf_apply_backend_options(&dev->conf, kind == IDE_CD, kind != IDE_CD,
201 &err);
202 if (err) {
203 error_propagate(errp, err);
204 return;
207 if (ide_init_drive(s, dev->conf.blk, kind,
208 dev->version, dev->serial, dev->model, dev->wwn,
209 dev->conf.cyls, dev->conf.heads, dev->conf.secs,
210 dev->chs_trans, errp) < 0) {
211 return;
214 if (!dev->version) {
215 dev->version = g_strdup(s->version);
217 if (!dev->serial) {
218 dev->serial = g_strdup(s->drive_serial_str);
221 add_boot_device_path(dev->conf.bootindex, &dev->qdev,
222 dev->unit ? "/disk@1" : "/disk@0");
225 static void ide_dev_get_bootindex(Object *obj, Visitor *v, const char *name,
226 void *opaque, Error **errp)
228 IDEDevice *d = IDE_DEVICE(obj);
230 visit_type_int32(v, name, &d->conf.bootindex, errp);
233 static void ide_dev_set_bootindex(Object *obj, Visitor *v, const char *name,
234 void *opaque, Error **errp)
236 IDEDevice *d = IDE_DEVICE(obj);
237 int32_t boot_index;
238 Error *local_err = NULL;
240 visit_type_int32(v, name, &boot_index, &local_err);
241 if (local_err) {
242 goto out;
244 /* check whether bootindex is present in fw_boot_order list */
245 check_boot_index(boot_index, &local_err);
246 if (local_err) {
247 goto out;
249 /* change bootindex to a new one */
250 d->conf.bootindex = boot_index;
252 if (d->unit != -1) {
253 add_boot_device_path(d->conf.bootindex, &d->qdev,
254 d->unit ? "/disk@1" : "/disk@0");
256 out:
257 error_propagate(errp, local_err);
260 static void ide_dev_instance_init(Object *obj)
262 object_property_add(obj, "bootindex", "int32",
263 ide_dev_get_bootindex,
264 ide_dev_set_bootindex, NULL, NULL, NULL);
265 object_property_set_int(obj, -1, "bootindex", NULL);
268 static void ide_hd_realize(IDEDevice *dev, Error **errp)
270 ide_dev_initfn(dev, IDE_HD, errp);
273 static void ide_cd_realize(IDEDevice *dev, Error **errp)
275 ide_dev_initfn(dev, IDE_CD, errp);
278 static void ide_drive_realize(IDEDevice *dev, Error **errp)
280 DriveInfo *dinfo = NULL;
282 if (dev->conf.blk) {
283 dinfo = blk_legacy_dinfo(dev->conf.blk);
286 ide_dev_initfn(dev, dinfo && dinfo->media_cd ? IDE_CD : IDE_HD, errp);
289 #define DEFINE_IDE_DEV_PROPERTIES() \
290 DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf), \
291 DEFINE_BLOCK_ERROR_PROPERTIES(IDEDrive, dev.conf), \
292 DEFINE_PROP_STRING("ver", IDEDrive, dev.version), \
293 DEFINE_PROP_UINT64("wwn", IDEDrive, dev.wwn, 0), \
294 DEFINE_PROP_STRING("serial", IDEDrive, dev.serial),\
295 DEFINE_PROP_STRING("model", IDEDrive, dev.model)
297 static Property ide_hd_properties[] = {
298 DEFINE_IDE_DEV_PROPERTIES(),
299 DEFINE_BLOCK_CHS_PROPERTIES(IDEDrive, dev.conf),
300 DEFINE_PROP_BIOS_CHS_TRANS("bios-chs-trans",
301 IDEDrive, dev.chs_trans, BIOS_ATA_TRANSLATION_AUTO),
302 DEFINE_PROP_END_OF_LIST(),
305 static void ide_hd_class_init(ObjectClass *klass, void *data)
307 DeviceClass *dc = DEVICE_CLASS(klass);
308 IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
310 k->realize = ide_hd_realize;
311 dc->fw_name = "drive";
312 dc->desc = "virtual IDE disk";
313 dc->props = ide_hd_properties;
316 static const TypeInfo ide_hd_info = {
317 .name = "ide-hd",
318 .parent = TYPE_IDE_DEVICE,
319 .instance_size = sizeof(IDEDrive),
320 .class_init = ide_hd_class_init,
323 static Property ide_cd_properties[] = {
324 DEFINE_IDE_DEV_PROPERTIES(),
325 DEFINE_PROP_END_OF_LIST(),
328 static void ide_cd_class_init(ObjectClass *klass, void *data)
330 DeviceClass *dc = DEVICE_CLASS(klass);
331 IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
333 k->realize = ide_cd_realize;
334 dc->fw_name = "drive";
335 dc->desc = "virtual IDE CD-ROM";
336 dc->props = ide_cd_properties;
339 static const TypeInfo ide_cd_info = {
340 .name = "ide-cd",
341 .parent = TYPE_IDE_DEVICE,
342 .instance_size = sizeof(IDEDrive),
343 .class_init = ide_cd_class_init,
346 static Property ide_drive_properties[] = {
347 DEFINE_IDE_DEV_PROPERTIES(),
348 DEFINE_PROP_END_OF_LIST(),
351 static void ide_drive_class_init(ObjectClass *klass, void *data)
353 DeviceClass *dc = DEVICE_CLASS(klass);
354 IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
356 k->realize = ide_drive_realize;
357 dc->fw_name = "drive";
358 dc->desc = "virtual IDE disk or CD-ROM (legacy)";
359 dc->props = ide_drive_properties;
362 static const TypeInfo ide_drive_info = {
363 .name = "ide-drive",
364 .parent = TYPE_IDE_DEVICE,
365 .instance_size = sizeof(IDEDrive),
366 .class_init = ide_drive_class_init,
369 static void ide_device_class_init(ObjectClass *klass, void *data)
371 DeviceClass *k = DEVICE_CLASS(klass);
372 k->realize = ide_qdev_realize;
373 set_bit(DEVICE_CATEGORY_STORAGE, k->categories);
374 k->bus_type = TYPE_IDE_BUS;
375 k->props = ide_props;
378 static const TypeInfo ide_device_type_info = {
379 .name = TYPE_IDE_DEVICE,
380 .parent = TYPE_DEVICE,
381 .instance_size = sizeof(IDEDevice),
382 .abstract = true,
383 .class_size = sizeof(IDEDeviceClass),
384 .class_init = ide_device_class_init,
385 .instance_init = ide_dev_instance_init,
388 static void ide_register_types(void)
390 type_register_static(&ide_bus_info);
391 type_register_static(&ide_hd_info);
392 type_register_static(&ide_cd_info);
393 type_register_static(&ide_drive_info);
394 type_register_static(&ide_device_type_info);
397 type_init(ide_register_types)