jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
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 "hw/qdev-properties.h"
29#include "sysemu/block-backend.h"
30#include "sysemu/blockdev.h"
31#include "hw/block/block.h"
32#include "sysemu/sysemu.h"
33#include "sysemu/runstate.h"
34#include "qapi/visitor.h"
35
36/* --------------------------------- */
37
38static char *idebus_get_fw_dev_path(DeviceState *dev);
39static void idebus_unrealize(BusState *qdev);
40
41static Property ide_props[] = {
42 DEFINE_PROP_UINT32("unit", IDEDevice, unit, -1),
43 DEFINE_PROP_END_OF_LIST(),
44};
45
46static void ide_bus_class_init(ObjectClass *klass, void *data)
47{
48 BusClass *k = BUS_CLASS(klass);
49
50 k->get_fw_dev_path = idebus_get_fw_dev_path;
51 k->unrealize = idebus_unrealize;
52}
53
54static void idebus_unrealize(BusState *bus)
55{
56 IDEBus *ibus = IDE_BUS(bus);
57
58 if (ibus->vmstate) {
59 qemu_del_vm_change_state_handler(ibus->vmstate);
60 }
61}
62
63static const TypeInfo ide_bus_info = {
64 .name = TYPE_IDE_BUS,
65 .parent = TYPE_BUS,
66 .instance_size = sizeof(IDEBus),
67 .class_init = ide_bus_class_init,
68};
69
70void ide_bus_new(IDEBus *idebus, size_t idebus_size, DeviceState *dev,
71 int bus_id, int max_units)
72{
73 qbus_create_inplace(idebus, idebus_size, TYPE_IDE_BUS, dev, NULL);
74 idebus->bus_id = bus_id;
75 idebus->max_units = max_units;
76}
77
78static char *idebus_get_fw_dev_path(DeviceState *dev)
79{
80 char path[30];
81
82 snprintf(path, sizeof(path), "%s@%x", qdev_fw_name(dev),
83 ((IDEBus*)dev->parent_bus)->bus_id);
84
85 return g_strdup(path);
86}
87
88static void ide_qdev_realize(DeviceState *qdev, Error **errp)
89{
90 IDEDevice *dev = IDE_DEVICE(qdev);
91 IDEDeviceClass *dc = IDE_DEVICE_GET_CLASS(dev);
92 IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
93
94 if (dev->unit == -1) {
95 dev->unit = bus->master ? 1 : 0;
96 }
97
98 if (dev->unit >= bus->max_units) {
99 error_setg(errp, "Can't create IDE unit %d, bus supports only %d units",
100 dev->unit, bus->max_units);
101 return;
102 }
103
104 switch (dev->unit) {
105 case 0:
106 if (bus->master) {
107 error_setg(errp, "IDE unit %d is in use", dev->unit);
108 return;
109 }
110 bus->master = dev;
111 break;
112 case 1:
113 if (bus->slave) {
114 error_setg(errp, "IDE unit %d is in use", dev->unit);
115 return;
116 }
117 bus->slave = dev;
118 break;
119 default:
120 error_setg(errp, "Invalid IDE unit %d", dev->unit);
121 return;
122 }
123 dc->realize(dev, errp);
124}
125
126IDEDevice *ide_create_drive(IDEBus *bus, int unit, DriveInfo *drive)
127{
128 DeviceState *dev;
129
130 dev = qdev_new(drive->media_cd ? "ide-cd" : "ide-hd");
131 qdev_prop_set_uint32(dev, "unit", unit);
132 qdev_prop_set_drive_err(dev, "drive", blk_by_legacy_dinfo(drive),
133 &error_fatal);
134 qdev_realize_and_unref(dev, &bus->qbus, &error_fatal);
135 return DO_UPCAST(IDEDevice, qdev, dev);
136}
137
138int ide_get_geometry(BusState *bus, int unit,
139 int16_t *cyls, int8_t *heads, int8_t *secs)
140{
141 IDEState *s = &DO_UPCAST(IDEBus, qbus, bus)->ifs[unit];
142
143 if (s->drive_kind != IDE_HD || !s->blk) {
144 return -1;
145 }
146
147 *cyls = s->cylinders;
148 *heads = s->heads;
149 *secs = s->sectors;
150 return 0;
151}
152
153int ide_get_bios_chs_trans(BusState *bus, int unit)
154{
155 return DO_UPCAST(IDEBus, qbus, bus)->ifs[unit].chs_trans;
156}
157
158/* --------------------------------- */
159
160typedef struct IDEDrive {
161 IDEDevice dev;
162} IDEDrive;
163
164static void ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind, Error **errp)
165{
166 IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus);
167 IDEState *s = bus->ifs + dev->unit;
168 int ret;
169
170 if (!dev->conf.blk) {
171 if (kind != IDE_CD) {
172 error_setg(errp, "No drive specified");
173 return;
174 } else {
175 /* Anonymous BlockBackend for an empty drive */
176 dev->conf.blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
177 ret = blk_attach_dev(dev->conf.blk, &dev->qdev);
178 assert(ret == 0);
179 }
180 }
181
182 if (dev->conf.discard_granularity == -1) {
183 dev->conf.discard_granularity = 512;
184 } else if (dev->conf.discard_granularity &&
185 dev->conf.discard_granularity != 512) {
186 error_setg(errp, "discard_granularity must be 512 for ide");
187 return;
188 }
189
190 if (!blkconf_blocksizes(&dev->conf, errp)) {
191 return;
192 }
193
194 if (dev->conf.logical_block_size != 512) {
195 error_setg(errp, "logical_block_size must be 512 for IDE");
196 return;
197 }
198
199 if (kind != IDE_CD) {
200 if (!blkconf_geometry(&dev->conf, &dev->chs_trans, 65535, 16, 255,
201 errp)) {
202 return;
203 }
204 }
205 if (!blkconf_apply_backend_options(&dev->conf, kind == IDE_CD,
206 kind != IDE_CD, errp)) {
207 return;
208 }
209
210 if (ide_init_drive(s, dev->conf.blk, kind,
211 dev->version, dev->serial, dev->model, dev->wwn,
212 dev->conf.cyls, dev->conf.heads, dev->conf.secs,
213 dev->chs_trans, errp) < 0) {
214 return;
215 }
216
217 if (!dev->version) {
218 dev->version = g_strdup(s->version);
219 }
220 if (!dev->serial) {
221 dev->serial = g_strdup(s->drive_serial_str);
222 }
223
224 add_boot_device_path(dev->conf.bootindex, &dev->qdev,
225 dev->unit ? "/disk@1" : "/disk@0");
226
227 add_boot_device_lchs(&dev->qdev, dev->unit ? "/disk@1" : "/disk@0",
228 dev->conf.lcyls,
229 dev->conf.lheads,
230 dev->conf.lsecs);
231}
232
233static void ide_dev_get_bootindex(Object *obj, Visitor *v, const char *name,
234 void *opaque, Error **errp)
235{
236 IDEDevice *d = IDE_DEVICE(obj);
237
238 visit_type_int32(v, name, &d->conf.bootindex, errp);
239}
240
241static void ide_dev_set_bootindex(Object *obj, Visitor *v, const char *name,
242 void *opaque, Error **errp)
243{
244 IDEDevice *d = IDE_DEVICE(obj);
245 int32_t boot_index;
246 Error *local_err = NULL;
247
248 if (!visit_type_int32(v, name, &boot_index, errp)) {
249 return;
250 }
251 /* check whether bootindex is present in fw_boot_order list */
252 check_boot_index(boot_index, &local_err);
253 if (local_err) {
254 goto out;
255 }
256 /* change bootindex to a new one */
257 d->conf.bootindex = boot_index;
258
259 if (d->unit != -1) {
260 add_boot_device_path(d->conf.bootindex, &d->qdev,
261 d->unit ? "/disk@1" : "/disk@0");
262 }
263out:
264 error_propagate(errp, local_err);
265}
266
267static void ide_dev_instance_init(Object *obj)
268{
269 object_property_add(obj, "bootindex", "int32",
270 ide_dev_get_bootindex,
271 ide_dev_set_bootindex, NULL, NULL);
272 object_property_set_int(obj, "bootindex", -1, NULL);
273}
274
275static void ide_hd_realize(IDEDevice *dev, Error **errp)
276{
277 ide_dev_initfn(dev, IDE_HD, errp);
278}
279
280static void ide_cd_realize(IDEDevice *dev, Error **errp)
281{
282 ide_dev_initfn(dev, IDE_CD, errp);
283}
284
285static void ide_drive_realize(IDEDevice *dev, Error **errp)
286{
287 DriveInfo *dinfo = NULL;
288
289 warn_report("'ide-drive' is deprecated, "
290 "please use 'ide-hd' or 'ide-cd' instead");
291
292 if (dev->conf.blk) {
293 dinfo = blk_legacy_dinfo(dev->conf.blk);
294 }
295
296 ide_dev_initfn(dev, dinfo && dinfo->media_cd ? IDE_CD : IDE_HD, errp);
297}
298
299#define DEFINE_IDE_DEV_PROPERTIES() \
300 DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf), \
301 DEFINE_BLOCK_ERROR_PROPERTIES(IDEDrive, dev.conf), \
302 DEFINE_PROP_STRING("ver", IDEDrive, dev.version), \
303 DEFINE_PROP_UINT64("wwn", IDEDrive, dev.wwn, 0), \
304 DEFINE_PROP_STRING("serial", IDEDrive, dev.serial),\
305 DEFINE_PROP_STRING("model", IDEDrive, dev.model)
306
307static Property ide_hd_properties[] = {
308 DEFINE_IDE_DEV_PROPERTIES(),
309 DEFINE_BLOCK_CHS_PROPERTIES(IDEDrive, dev.conf),
310 DEFINE_PROP_BIOS_CHS_TRANS("bios-chs-trans",
311 IDEDrive, dev.chs_trans, BIOS_ATA_TRANSLATION_AUTO),
312 DEFINE_PROP_UINT16("rotation_rate", IDEDrive, dev.rotation_rate, 0),
313 DEFINE_PROP_END_OF_LIST(),
314};
315
316static void ide_hd_class_init(ObjectClass *klass, void *data)
317{
318 DeviceClass *dc = DEVICE_CLASS(klass);
319 IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
320
321 k->realize = ide_hd_realize;
322 dc->fw_name = "drive";
323 dc->desc = "virtual IDE disk";
324 device_class_set_props(dc, ide_hd_properties);
325}
326
327static const TypeInfo ide_hd_info = {
328 .name = "ide-hd",
329 .parent = TYPE_IDE_DEVICE,
330 .instance_size = sizeof(IDEDrive),
331 .class_init = ide_hd_class_init,
332};
333
334static Property ide_cd_properties[] = {
335 DEFINE_IDE_DEV_PROPERTIES(),
336 DEFINE_PROP_END_OF_LIST(),
337};
338
339static void ide_cd_class_init(ObjectClass *klass, void *data)
340{
341 DeviceClass *dc = DEVICE_CLASS(klass);
342 IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
343
344 k->realize = ide_cd_realize;
345 dc->fw_name = "drive";
346 dc->desc = "virtual IDE CD-ROM";
347 device_class_set_props(dc, ide_cd_properties);
348}
349
350static const TypeInfo ide_cd_info = {
351 .name = "ide-cd",
352 .parent = TYPE_IDE_DEVICE,
353 .instance_size = sizeof(IDEDrive),
354 .class_init = ide_cd_class_init,
355};
356
357static Property ide_drive_properties[] = {
358 DEFINE_IDE_DEV_PROPERTIES(),
359 DEFINE_PROP_END_OF_LIST(),
360};
361
362static void ide_drive_class_init(ObjectClass *klass, void *data)
363{
364 DeviceClass *dc = DEVICE_CLASS(klass);
365 IDEDeviceClass *k = IDE_DEVICE_CLASS(klass);
366
367 k->realize = ide_drive_realize;
368 dc->fw_name = "drive";
369 dc->desc = "virtual IDE disk or CD-ROM (legacy)";
370 device_class_set_props(dc, ide_drive_properties);
371}
372
373static const TypeInfo ide_drive_info = {
374 .name = "ide-drive",
375 .parent = TYPE_IDE_DEVICE,
376 .instance_size = sizeof(IDEDrive),
377 .class_init = ide_drive_class_init,
378};
379
380static void ide_device_class_init(ObjectClass *klass, void *data)
381{
382 DeviceClass *k = DEVICE_CLASS(klass);
383 k->realize = ide_qdev_realize;
384 set_bit(DEVICE_CATEGORY_STORAGE, k->categories);
385 k->bus_type = TYPE_IDE_BUS;
386 device_class_set_props(k, ide_props);
387}
388
389static const TypeInfo ide_device_type_info = {
390 .name = TYPE_IDE_DEVICE,
391 .parent = TYPE_DEVICE,
392 .instance_size = sizeof(IDEDevice),
393 .abstract = true,
394 .class_size = sizeof(IDEDeviceClass),
395 .class_init = ide_device_class_init,
396 .instance_init = ide_dev_instance_init,
397};
398
399static void ide_register_types(void)
400{
401 type_register_static(&ide_bus_info);
402 type_register_static(&ide_hd_info);
403 type_register_static(&ide_cd_info);
404 type_register_static(&ide_drive_info);
405 type_register_static(&ide_device_type_info);
406}
407
408type_init(ide_register_types)