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root / hw / scsi-bus.c @ 42e766a2

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1
#include "hw.h"
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#include "qemu-error.h"
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#include "scsi.h"
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#include "scsi-defs.h"
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#include "qdev.h"
6

    
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static struct BusInfo scsi_bus_info = {
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    .name  = "SCSI",
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    .size  = sizeof(SCSIBus),
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    .props = (Property[]) {
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        DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1),
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        DEFINE_PROP_END_OF_LIST(),
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    },
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};
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static int next_scsi_bus;
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/* Create a scsi bus, and attach devices to it.  */
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void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
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                  scsi_completionfn complete)
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{
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    qbus_create_inplace(&bus->qbus, &scsi_bus_info, host, NULL);
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    bus->busnr = next_scsi_bus++;
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    bus->tcq = tcq;
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    bus->ndev = ndev;
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    bus->complete = complete;
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    bus->qbus.allow_hotplug = 1;
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}
28

    
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static int scsi_qdev_init(DeviceState *qdev, DeviceInfo *base)
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{
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    SCSIDevice *dev = DO_UPCAST(SCSIDevice, qdev, qdev);
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    SCSIDeviceInfo *info = DO_UPCAST(SCSIDeviceInfo, qdev, base);
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    SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
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    int rc = -1;
35

    
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    if (dev->id == -1) {
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        for (dev->id = 0; dev->id < bus->ndev; dev->id++) {
38
            if (bus->devs[dev->id] == NULL)
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                break;
40
        }
41
    }
42
    if (dev->id >= bus->ndev) {
43
        error_report("bad scsi device id: %d", dev->id);
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        goto err;
45
    }
46

    
47
    if (bus->devs[dev->id]) {
48
        qdev_free(&bus->devs[dev->id]->qdev);
49
    }
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    bus->devs[dev->id] = dev;
51

    
52
    dev->info = info;
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    QTAILQ_INIT(&dev->requests);
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    rc = dev->info->init(dev);
55
    if (rc != 0) {
56
        bus->devs[dev->id] = NULL;
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    }
58

    
59
err:
60
    return rc;
61
}
62

    
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static int scsi_qdev_exit(DeviceState *qdev)
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{
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    SCSIDevice *dev = DO_UPCAST(SCSIDevice, qdev, qdev);
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    SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
67

    
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    assert(bus->devs[dev->id] != NULL);
69
    if (bus->devs[dev->id]->info->destroy) {
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        bus->devs[dev->id]->info->destroy(bus->devs[dev->id]);
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    }
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    bus->devs[dev->id] = NULL;
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    return 0;
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}
75

    
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void scsi_qdev_register(SCSIDeviceInfo *info)
77
{
78
    info->qdev.bus_info = &scsi_bus_info;
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    info->qdev.init     = scsi_qdev_init;
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    info->qdev.unplug   = qdev_simple_unplug_cb;
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    info->qdev.exit     = scsi_qdev_exit;
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    qdev_register(&info->qdev);
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}
84

    
85
/* handle legacy '-drive if=scsi,...' cmd line args */
86
SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv, int unit)
87
{
88
    const char *driver;
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    DeviceState *dev;
90

    
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    driver = bdrv_is_sg(bdrv) ? "scsi-generic" : "scsi-disk";
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    dev = qdev_create(&bus->qbus, driver);
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    qdev_prop_set_uint32(dev, "scsi-id", unit);
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    if (qdev_prop_set_drive(dev, "drive", bdrv) < 0) {
95
        qdev_free(dev);
96
        return NULL;
97
    }
98
    if (qdev_init(dev) < 0)
99
        return NULL;
100
    return DO_UPCAST(SCSIDevice, qdev, dev);
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}
102

    
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int scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
104
{
105
    Location loc;
106
    DriveInfo *dinfo;
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    int res = 0, unit;
108

    
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    loc_push_none(&loc);
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    for (unit = 0; unit < MAX_SCSI_DEVS; unit++) {
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        dinfo = drive_get(IF_SCSI, bus->busnr, unit);
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        if (dinfo == NULL) {
113
            continue;
114
        }
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        qemu_opts_loc_restore(dinfo->opts);
116
        if (!scsi_bus_legacy_add_drive(bus, dinfo->bdrv, unit)) {
117
            res = -1;
118
            break;
119
        }
120
    }
121
    loc_pop(&loc);
122
    return res;
123
}
124

    
125
void scsi_dev_clear_sense(SCSIDevice *dev)
126
{
127
    memset(&dev->sense, 0, sizeof(dev->sense));
128
}
129

    
130
void scsi_dev_set_sense(SCSIDevice *dev, uint8_t key)
131
{
132
    dev->sense.key = key;
133
}
134

    
135
SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun)
136
{
137
    SCSIRequest *req;
138

    
139
    req = qemu_mallocz(size);
140
    req->bus = scsi_bus_from_device(d);
141
    req->dev = d;
142
    req->tag = tag;
143
    req->lun = lun;
144
    req->status = -1;
145
    QTAILQ_INSERT_TAIL(&d->requests, req, next);
146
    return req;
147
}
148

    
149
SCSIRequest *scsi_req_find(SCSIDevice *d, uint32_t tag)
150
{
151
    SCSIRequest *req;
152

    
153
    QTAILQ_FOREACH(req, &d->requests, next) {
154
        if (req->tag == tag) {
155
            return req;
156
        }
157
    }
158
    return NULL;
159
}
160

    
161
void scsi_req_free(SCSIRequest *req)
162
{
163
    QTAILQ_REMOVE(&req->dev->requests, req, next);
164
    qemu_free(req);
165
}
166

    
167
static int scsi_req_length(SCSIRequest *req, uint8_t *cmd)
168
{
169
    switch (cmd[0] >> 5) {
170
    case 0:
171
        req->cmd.xfer = cmd[4];
172
        req->cmd.len = 6;
173
        /* length 0 means 256 blocks */
174
        if (req->cmd.xfer == 0)
175
            req->cmd.xfer = 256;
176
        break;
177
    case 1:
178
    case 2:
179
        req->cmd.xfer = cmd[8] | (cmd[7] << 8);
180
        req->cmd.len = 10;
181
        break;
182
    case 4:
183
        req->cmd.xfer = cmd[13] | (cmd[12] << 8) | (cmd[11] << 16) | (cmd[10] << 24);
184
        req->cmd.len = 16;
185
        break;
186
    case 5:
187
        req->cmd.xfer = cmd[9] | (cmd[8] << 8) | (cmd[7] << 16) | (cmd[6] << 24);
188
        req->cmd.len = 12;
189
        break;
190
    default:
191
        return -1;
192
    }
193

    
194
    switch(cmd[0]) {
195
    case TEST_UNIT_READY:
196
    case REZERO_UNIT:
197
    case START_STOP:
198
    case SEEK_6:
199
    case WRITE_FILEMARKS:
200
    case SPACE:
201
    case ERASE:
202
    case ALLOW_MEDIUM_REMOVAL:
203
    case VERIFY:
204
    case SEEK_10:
205
    case SYNCHRONIZE_CACHE:
206
    case LOCK_UNLOCK_CACHE:
207
    case LOAD_UNLOAD:
208
    case SET_CD_SPEED:
209
    case SET_LIMITS:
210
    case WRITE_LONG:
211
    case MOVE_MEDIUM:
212
    case UPDATE_BLOCK:
213
        req->cmd.xfer = 0;
214
        break;
215
    case MODE_SENSE:
216
        break;
217
    case WRITE_SAME:
218
        req->cmd.xfer = 1;
219
        break;
220
    case READ_CAPACITY:
221
        req->cmd.xfer = 8;
222
        break;
223
    case READ_BLOCK_LIMITS:
224
        req->cmd.xfer = 6;
225
        break;
226
    case READ_POSITION:
227
        req->cmd.xfer = 20;
228
        break;
229
    case SEND_VOLUME_TAG:
230
        req->cmd.xfer *= 40;
231
        break;
232
    case MEDIUM_SCAN:
233
        req->cmd.xfer *= 8;
234
        break;
235
    case WRITE_10:
236
    case WRITE_VERIFY:
237
    case WRITE_6:
238
    case WRITE_12:
239
    case WRITE_VERIFY_12:
240
    case WRITE_16:
241
    case WRITE_VERIFY_16:
242
        req->cmd.xfer *= req->dev->blocksize;
243
        break;
244
    case READ_10:
245
    case READ_6:
246
    case READ_REVERSE:
247
    case RECOVER_BUFFERED_DATA:
248
    case READ_12:
249
    case READ_16:
250
        req->cmd.xfer *= req->dev->blocksize;
251
        break;
252
    case INQUIRY:
253
        req->cmd.xfer = cmd[4] | (cmd[3] << 8);
254
        break;
255
    case MAINTENANCE_OUT:
256
    case MAINTENANCE_IN:
257
        if (req->dev->type == TYPE_ROM) {
258
            /* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */
259
            req->cmd.xfer = cmd[9] | (cmd[8] << 8);
260
        }
261
        break;
262
    }
263
    return 0;
264
}
265

    
266
static int scsi_req_stream_length(SCSIRequest *req, uint8_t *cmd)
267
{
268
    switch(cmd[0]) {
269
    /* stream commands */
270
    case READ_6:
271
    case READ_REVERSE:
272
    case RECOVER_BUFFERED_DATA:
273
    case WRITE_6:
274
        req->cmd.len = 6;
275
        req->cmd.xfer = cmd[4] | (cmd[3] << 8) | (cmd[2] << 16);
276
        if (cmd[1] & 0x01) /* fixed */
277
            req->cmd.xfer *= req->dev->blocksize;
278
        break;
279
    case REWIND:
280
    case START_STOP:
281
        req->cmd.len = 6;
282
        req->cmd.xfer = 0;
283
        break;
284
    /* generic commands */
285
    default:
286
        return scsi_req_length(req, cmd);
287
    }
288
    return 0;
289
}
290

    
291
static void scsi_req_xfer_mode(SCSIRequest *req)
292
{
293
    switch (req->cmd.buf[0]) {
294
    case WRITE_6:
295
    case WRITE_10:
296
    case WRITE_VERIFY:
297
    case WRITE_12:
298
    case WRITE_VERIFY_12:
299
    case WRITE_16:
300
    case WRITE_VERIFY_16:
301
    case COPY:
302
    case COPY_VERIFY:
303
    case COMPARE:
304
    case CHANGE_DEFINITION:
305
    case LOG_SELECT:
306
    case MODE_SELECT:
307
    case MODE_SELECT_10:
308
    case SEND_DIAGNOSTIC:
309
    case WRITE_BUFFER:
310
    case FORMAT_UNIT:
311
    case REASSIGN_BLOCKS:
312
    case RESERVE:
313
    case SEARCH_EQUAL:
314
    case SEARCH_HIGH:
315
    case SEARCH_LOW:
316
    case UPDATE_BLOCK:
317
    case WRITE_LONG:
318
    case WRITE_SAME:
319
    case SEARCH_HIGH_12:
320
    case SEARCH_EQUAL_12:
321
    case SEARCH_LOW_12:
322
    case SET_WINDOW:
323
    case MEDIUM_SCAN:
324
    case SEND_VOLUME_TAG:
325
    case WRITE_LONG_2:
326
    case PERSISTENT_RESERVE_OUT:
327
    case MAINTENANCE_OUT:
328
        req->cmd.mode = SCSI_XFER_TO_DEV;
329
        break;
330
    default:
331
        if (req->cmd.xfer)
332
            req->cmd.mode = SCSI_XFER_FROM_DEV;
333
        else {
334
            req->cmd.mode = SCSI_XFER_NONE;
335
        }
336
        break;
337
    }
338
}
339

    
340
static uint64_t scsi_req_lba(SCSIRequest *req)
341
{
342
    uint8_t *buf = req->cmd.buf;
343
    uint64_t lba;
344

    
345
    switch (buf[0] >> 5) {
346
    case 0:
347
        lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) |
348
              (((uint64_t) buf[1] & 0x1f) << 16);
349
        break;
350
    case 1:
351
    case 2:
352
        lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) |
353
              ((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24);
354
        break;
355
    case 4:
356
        lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) |
357
              ((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) |
358
              ((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) |
359
              ((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56);
360
        break;
361
    case 5:
362
        lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) |
363
              ((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24);
364
        break;
365
    default:
366
        lba = -1;
367

    
368
    }
369
    return lba;
370
}
371

    
372
int scsi_req_parse(SCSIRequest *req, uint8_t *buf)
373
{
374
    int rc;
375

    
376
    if (req->dev->type == TYPE_TAPE) {
377
        rc = scsi_req_stream_length(req, buf);
378
    } else {
379
        rc = scsi_req_length(req, buf);
380
    }
381
    if (rc != 0)
382
        return rc;
383

    
384
    memcpy(req->cmd.buf, buf, req->cmd.len);
385
    scsi_req_xfer_mode(req);
386
    req->cmd.lba = scsi_req_lba(req);
387
    return 0;
388
}
389

    
390
static const char *scsi_command_name(uint8_t cmd)
391
{
392
    static const char *names[] = {
393
        [ TEST_UNIT_READY          ] = "TEST_UNIT_READY",
394
        [ REZERO_UNIT              ] = "REZERO_UNIT",
395
        /* REWIND and REZERO_UNIT use the same operation code */
396
        [ REQUEST_SENSE            ] = "REQUEST_SENSE",
397
        [ FORMAT_UNIT              ] = "FORMAT_UNIT",
398
        [ READ_BLOCK_LIMITS        ] = "READ_BLOCK_LIMITS",
399
        [ REASSIGN_BLOCKS          ] = "REASSIGN_BLOCKS",
400
        [ READ_6                   ] = "READ_6",
401
        [ WRITE_6                  ] = "WRITE_6",
402
        [ SEEK_6                   ] = "SEEK_6",
403
        [ READ_REVERSE             ] = "READ_REVERSE",
404
        [ WRITE_FILEMARKS          ] = "WRITE_FILEMARKS",
405
        [ SPACE                    ] = "SPACE",
406
        [ INQUIRY                  ] = "INQUIRY",
407
        [ RECOVER_BUFFERED_DATA    ] = "RECOVER_BUFFERED_DATA",
408
        [ MAINTENANCE_IN           ] = "MAINTENANCE_IN",
409
        [ MAINTENANCE_OUT          ] = "MAINTENANCE_OUT",
410
        [ MODE_SELECT              ] = "MODE_SELECT",
411
        [ RESERVE                  ] = "RESERVE",
412
        [ RELEASE                  ] = "RELEASE",
413
        [ COPY                     ] = "COPY",
414
        [ ERASE                    ] = "ERASE",
415
        [ MODE_SENSE               ] = "MODE_SENSE",
416
        [ START_STOP               ] = "START_STOP",
417
        [ RECEIVE_DIAGNOSTIC       ] = "RECEIVE_DIAGNOSTIC",
418
        [ SEND_DIAGNOSTIC          ] = "SEND_DIAGNOSTIC",
419
        [ ALLOW_MEDIUM_REMOVAL     ] = "ALLOW_MEDIUM_REMOVAL",
420

    
421
        [ SET_WINDOW               ] = "SET_WINDOW",
422
        [ READ_CAPACITY            ] = "READ_CAPACITY",
423
        [ READ_10                  ] = "READ_10",
424
        [ WRITE_10                 ] = "WRITE_10",
425
        [ SEEK_10                  ] = "SEEK_10",
426
        [ WRITE_VERIFY             ] = "WRITE_VERIFY",
427
        [ VERIFY                   ] = "VERIFY",
428
        [ SEARCH_HIGH              ] = "SEARCH_HIGH",
429
        [ SEARCH_EQUAL             ] = "SEARCH_EQUAL",
430
        [ SEARCH_LOW               ] = "SEARCH_LOW",
431
        [ SET_LIMITS               ] = "SET_LIMITS",
432
        [ PRE_FETCH                ] = "PRE_FETCH",
433
        /* READ_POSITION and PRE_FETCH use the same operation code */
434
        [ SYNCHRONIZE_CACHE        ] = "SYNCHRONIZE_CACHE",
435
        [ LOCK_UNLOCK_CACHE        ] = "LOCK_UNLOCK_CACHE",
436
        [ READ_DEFECT_DATA         ] = "READ_DEFECT_DATA",
437
        [ MEDIUM_SCAN              ] = "MEDIUM_SCAN",
438
        [ COMPARE                  ] = "COMPARE",
439
        [ COPY_VERIFY              ] = "COPY_VERIFY",
440
        [ WRITE_BUFFER             ] = "WRITE_BUFFER",
441
        [ READ_BUFFER              ] = "READ_BUFFER",
442
        [ UPDATE_BLOCK             ] = "UPDATE_BLOCK",
443
        [ READ_LONG                ] = "READ_LONG",
444
        [ WRITE_LONG               ] = "WRITE_LONG",
445
        [ CHANGE_DEFINITION        ] = "CHANGE_DEFINITION",
446
        [ WRITE_SAME               ] = "WRITE_SAME",
447
        [ READ_TOC                 ] = "READ_TOC",
448
        [ LOG_SELECT               ] = "LOG_SELECT",
449
        [ LOG_SENSE                ] = "LOG_SENSE",
450
        [ MODE_SELECT_10           ] = "MODE_SELECT_10",
451
        [ RESERVE_10               ] = "RESERVE_10",
452
        [ RELEASE_10               ] = "RELEASE_10",
453
        [ MODE_SENSE_10            ] = "MODE_SENSE_10",
454
        [ PERSISTENT_RESERVE_IN    ] = "PERSISTENT_RESERVE_IN",
455
        [ PERSISTENT_RESERVE_OUT   ] = "PERSISTENT_RESERVE_OUT",
456
        [ MOVE_MEDIUM              ] = "MOVE_MEDIUM",
457
        [ READ_12                  ] = "READ_12",
458
        [ WRITE_12                 ] = "WRITE_12",
459
        [ WRITE_VERIFY_12          ] = "WRITE_VERIFY_12",
460
        [ SEARCH_HIGH_12           ] = "SEARCH_HIGH_12",
461
        [ SEARCH_EQUAL_12          ] = "SEARCH_EQUAL_12",
462
        [ SEARCH_LOW_12            ] = "SEARCH_LOW_12",
463
        [ READ_ELEMENT_STATUS      ] = "READ_ELEMENT_STATUS",
464
        [ SEND_VOLUME_TAG          ] = "SEND_VOLUME_TAG",
465
        [ WRITE_LONG_2             ] = "WRITE_LONG_2",
466

    
467
        [ REPORT_DENSITY_SUPPORT   ] = "REPORT_DENSITY_SUPPORT",
468
        [ GET_CONFIGURATION        ] = "GET_CONFIGURATION",
469
        [ READ_16                  ] = "READ_16",
470
        [ WRITE_16                 ] = "WRITE_16",
471
        [ WRITE_VERIFY_16          ] = "WRITE_VERIFY_16",
472
        [ SERVICE_ACTION_IN        ] = "SERVICE_ACTION_IN",
473
        [ REPORT_LUNS              ] = "REPORT_LUNS",
474
        [ LOAD_UNLOAD              ] = "LOAD_UNLOAD",
475
        [ SET_CD_SPEED             ] = "SET_CD_SPEED",
476
        [ BLANK                    ] = "BLANK",
477
    };
478

    
479
    if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL)
480
        return "*UNKNOWN*";
481
    return names[cmd];
482
}
483

    
484
void scsi_req_print(SCSIRequest *req)
485
{
486
    FILE *fp = stderr;
487
    int i;
488

    
489
    fprintf(fp, "[%s id=%d] %s",
490
            req->dev->qdev.parent_bus->name,
491
            req->dev->id,
492
            scsi_command_name(req->cmd.buf[0]));
493
    for (i = 1; i < req->cmd.len; i++) {
494
        fprintf(fp, " 0x%02x", req->cmd.buf[i]);
495
    }
496
    switch (req->cmd.mode) {
497
    case SCSI_XFER_NONE:
498
        fprintf(fp, " - none\n");
499
        break;
500
    case SCSI_XFER_FROM_DEV:
501
        fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer);
502
        break;
503
    case SCSI_XFER_TO_DEV:
504
        fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer);
505
        break;
506
    default:
507
        fprintf(fp, " - Oops\n");
508
        break;
509
    }
510
}
511

    
512
void scsi_req_complete(SCSIRequest *req)
513
{
514
    assert(req->status != -1);
515
    req->bus->complete(req->bus, SCSI_REASON_DONE,
516
                       req->tag,
517
                       req->status);
518
}