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2cc977e2 TS |
1 | /* |
2 | * Generic SCSI Device support | |
3 | * | |
4 | * Copyright (c) 2007 Bull S.A.S. | |
5 | * Based on code by Paul Brook | |
6 | * Based on code by Fabrice Bellard | |
7 | * | |
8 | * Written by Laurent Vivier <Laurent.Vivier@bull.net> | |
9 | * | |
10 | * This code is licenced under the LGPL. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include "qemu-common.h" | |
15 | #include "block.h" | |
16 | #include "scsi-disk.h" | |
17 | ||
18 | #ifndef __linux__ | |
19 | ||
20 | SCSIDevice *scsi_generic_init(BlockDriverState *bdrv, int tcq, | |
21 | scsi_completionfn completion, void *opaque) | |
22 | { | |
23 | return NULL; | |
24 | } | |
25 | ||
26 | #else /* __linux__ */ | |
27 | ||
28 | //#define DEBUG_SCSI | |
29 | ||
30 | #ifdef DEBUG_SCSI | |
31 | #define DPRINTF(fmt, args...) \ | |
32 | do { printf("scsi-generic: " fmt , ##args); } while (0) | |
33 | #else | |
34 | #define DPRINTF(fmt, args...) do {} while(0) | |
35 | #endif | |
36 | ||
37 | #define BADF(fmt, args...) \ | |
38 | do { fprintf(stderr, "scsi-generic: " fmt , ##args); } while (0) | |
39 | ||
40 | #include <stdio.h> | |
41 | #include <sys/types.h> | |
42 | #include <sys/stat.h> | |
43 | #include <unistd.h> | |
44 | #include <scsi/sg.h> | |
45 | #include <scsi/scsi.h> | |
46 | ||
47 | #define LOAD_UNLOAD 0xa6 | |
48 | #define SET_CD_SPEED 0xbb | |
49 | #define BLANK 0xa1 | |
50 | ||
51 | #define SCSI_CMD_BUF_SIZE 16 | |
52 | #define SCSI_SENSE_BUF_SIZE 32 | |
53 | ||
54 | #define SG_ERR_DRIVER_TIMEOUT 0x06 | |
55 | #define SG_ERR_DRIVER_SENSE 0x08 | |
56 | ||
57 | #ifndef MAX_UINT | |
58 | #define MAX_UINT ((unsigned int)-1) | |
59 | #endif | |
60 | ||
61 | typedef struct SCSIRequest { | |
62 | BlockDriverAIOCB *aiocb; | |
63 | struct SCSIRequest *next; | |
64 | SCSIDeviceState *dev; | |
65 | uint32_t tag; | |
66 | uint8_t cmd[SCSI_CMD_BUF_SIZE]; | |
67 | int cmdlen; | |
68 | uint8_t *buf; | |
69 | int buflen; | |
70 | int len; | |
71 | sg_io_hdr_t io_header; | |
72 | } SCSIRequest; | |
73 | ||
74 | struct SCSIDeviceState | |
75 | { | |
76 | SCSIRequest *requests; | |
77 | BlockDriverState *bdrv; | |
78 | int blocksize; | |
79 | int lun; | |
80 | scsi_completionfn completion; | |
81 | void *opaque; | |
82 | int driver_status; | |
83 | uint8_t sensebuf[SCSI_SENSE_BUF_SIZE]; | |
84 | }; | |
85 | ||
86 | /* Global pool of SCSIRequest structures. */ | |
87 | static SCSIRequest *free_requests = NULL; | |
88 | ||
89 | static SCSIRequest *scsi_new_request(SCSIDeviceState *s, uint32_t tag) | |
90 | { | |
91 | SCSIRequest *r; | |
92 | ||
93 | if (free_requests) { | |
94 | r = free_requests; | |
95 | free_requests = r->next; | |
96 | } else { | |
97 | r = qemu_malloc(sizeof(SCSIRequest)); | |
98 | r->buf = NULL; | |
99 | r->buflen = 0; | |
100 | } | |
101 | r->dev = s; | |
102 | r->tag = tag; | |
103 | memset(r->cmd, 0, sizeof(r->cmd)); | |
104 | memset(&r->io_header, 0, sizeof(r->io_header)); | |
105 | r->cmdlen = 0; | |
106 | r->len = 0; | |
107 | r->aiocb = NULL; | |
108 | ||
109 | /* link */ | |
110 | ||
111 | r->next = s->requests; | |
112 | s->requests = r; | |
113 | return r; | |
114 | } | |
115 | ||
116 | static void scsi_remove_request(SCSIRequest *r) | |
117 | { | |
118 | SCSIRequest *last; | |
119 | SCSIDeviceState *s = r->dev; | |
120 | ||
121 | if (s->requests == r) { | |
122 | s->requests = r->next; | |
123 | } else { | |
124 | last = s->requests; | |
125 | while (last && last->next != r) | |
126 | last = last->next; | |
127 | if (last) { | |
128 | last->next = r->next; | |
129 | } else { | |
130 | BADF("Orphaned request\n"); | |
131 | } | |
132 | } | |
133 | r->next = free_requests; | |
134 | free_requests = r; | |
135 | } | |
136 | ||
137 | static SCSIRequest *scsi_find_request(SCSIDeviceState *s, uint32_t tag) | |
138 | { | |
139 | SCSIRequest *r; | |
140 | ||
141 | r = s->requests; | |
142 | while (r && r->tag != tag) | |
143 | r = r->next; | |
144 | ||
145 | return r; | |
146 | } | |
147 | ||
148 | /* Helper function for command completion. */ | |
149 | static void scsi_command_complete(void *opaque, int ret) | |
150 | { | |
151 | SCSIRequest *r = (SCSIRequest *)opaque; | |
152 | SCSIDeviceState *s = r->dev; | |
153 | uint32_t tag; | |
154 | int sense; | |
155 | ||
156 | s->driver_status = r->io_header.driver_status; | |
157 | if (ret != 0) | |
158 | sense = HARDWARE_ERROR; | |
159 | else { | |
160 | if (s->driver_status & SG_ERR_DRIVER_TIMEOUT) { | |
161 | sense = HARDWARE_ERROR; | |
162 | BADF("Driver Timeout\n"); | |
163 | } else if ((s->driver_status & SG_ERR_DRIVER_SENSE) == 0) | |
164 | sense = NO_SENSE; | |
165 | else | |
166 | sense = s->sensebuf[2] & 0x0f; | |
167 | } | |
168 | ||
169 | DPRINTF("Command complete 0x%p tag=0x%x sense=%d\n", r, r->tag, sense); | |
170 | tag = r->tag; | |
171 | scsi_remove_request(r); | |
172 | s->completion(s->opaque, SCSI_REASON_DONE, tag, sense); | |
173 | } | |
174 | ||
175 | /* Cancel a pending data transfer. */ | |
176 | static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) | |
177 | { | |
178 | DPRINTF("scsi_cancel_io 0x%x\n", tag); | |
179 | SCSIDeviceState *s = d->state; | |
180 | SCSIRequest *r; | |
181 | DPRINTF("Cancel tag=0x%x\n", tag); | |
182 | r = scsi_find_request(s, tag); | |
183 | if (r) { | |
184 | if (r->aiocb) | |
185 | bdrv_aio_cancel(r->aiocb); | |
186 | r->aiocb = NULL; | |
187 | scsi_remove_request(r); | |
188 | } | |
189 | } | |
190 | ||
191 | static int execute_command(BlockDriverState *bdrv, | |
192 | SCSIRequest *r, int direction, | |
193 | BlockDriverCompletionFunc *complete) | |
194 | { | |
195 | ||
196 | r->io_header.interface_id = 'S'; | |
197 | r->io_header.dxfer_direction = direction; | |
198 | r->io_header.dxferp = r->buf; | |
199 | r->io_header.dxfer_len = r->buflen; | |
200 | r->io_header.cmdp = r->cmd; | |
201 | r->io_header.cmd_len = r->cmdlen; | |
202 | r->io_header.mx_sb_len = sizeof(r->dev->sensebuf); | |
203 | r->io_header.sbp = r->dev->sensebuf; | |
204 | r->io_header.timeout = MAX_UINT; | |
205 | r->io_header.usr_ptr = r; | |
206 | r->io_header.flags |= SG_FLAG_DIRECT_IO; | |
207 | ||
208 | if (bdrv_pwrite(bdrv, -1, &r->io_header, sizeof(r->io_header)) == -1) { | |
209 | BADF("execute_command: write failed ! (%d)\n", errno); | |
210 | return -1; | |
211 | } | |
212 | if (complete == NULL) { | |
213 | int ret; | |
214 | r->aiocb = NULL; | |
215 | while ((ret = bdrv_pread(bdrv, -1, &r->io_header, | |
216 | sizeof(r->io_header))) == -1 && | |
217 | errno == EINTR); | |
218 | if (ret == -1) { | |
219 | BADF("execute_command: read failed !\n"); | |
220 | return -1; | |
221 | } | |
222 | return 0; | |
223 | } | |
224 | ||
225 | r->aiocb = bdrv_aio_read(bdrv, 0, (uint8_t*)&r->io_header, | |
226 | -(int64_t)sizeof(r->io_header), complete, r); | |
227 | if (r->aiocb == NULL) { | |
228 | BADF("execute_command: read failed !\n"); | |
229 | return -1; | |
230 | } | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
235 | static void scsi_read_complete(void * opaque, int ret) | |
236 | { | |
237 | SCSIRequest *r = (SCSIRequest *)opaque; | |
238 | SCSIDeviceState *s = r->dev; | |
239 | int len; | |
240 | ||
241 | if (ret) { | |
242 | DPRINTF("IO error\n"); | |
243 | scsi_command_complete(r, ret); | |
244 | return; | |
245 | } | |
246 | len = r->io_header.dxfer_len - r->io_header.resid; | |
247 | DPRINTF("Data ready tag=0x%x len=%d\n", r->tag, len); | |
248 | ||
249 | r->len = -1; | |
250 | s->completion(s->opaque, SCSI_REASON_DATA, r->tag, len); | |
251 | } | |
252 | ||
253 | /* Read more data from scsi device into buffer. */ | |
254 | static void scsi_read_data(SCSIDevice *d, uint32_t tag) | |
255 | { | |
256 | SCSIDeviceState *s = d->state; | |
257 | SCSIRequest *r; | |
258 | int ret; | |
259 | ||
260 | DPRINTF("scsi_read_data 0x%x\n", tag); | |
261 | r = scsi_find_request(s, tag); | |
262 | if (!r) { | |
263 | BADF("Bad read tag 0x%x\n", tag); | |
264 | /* ??? This is the wrong error. */ | |
265 | scsi_command_complete(r, -EINVAL); | |
266 | return; | |
267 | } | |
268 | ||
269 | if (r->len == -1) { | |
270 | scsi_command_complete(r, 0); | |
271 | return; | |
272 | } | |
273 | ||
274 | if (r->cmd[0] == REQUEST_SENSE && s->driver_status & SG_ERR_DRIVER_SENSE) | |
275 | { | |
276 | memcpy(r->buf, s->sensebuf, 16); | |
277 | r->io_header.driver_status = 0; | |
278 | r->len = -1; | |
279 | s->completion(s->opaque, SCSI_REASON_DATA, r->tag, 16); | |
280 | return; | |
281 | } | |
282 | ||
283 | ret = execute_command(s->bdrv, r, SG_DXFER_FROM_DEV, scsi_read_complete); | |
284 | if (ret == -1) { | |
285 | scsi_command_complete(r, -EINVAL); | |
286 | return; | |
287 | } | |
288 | } | |
289 | ||
290 | static void scsi_write_complete(void * opaque, int ret) | |
291 | { | |
292 | SCSIRequest *r = (SCSIRequest *)opaque; | |
293 | ||
294 | DPRINTF("scsi_write_complete() ret = %d\n", ret); | |
295 | if (ret) { | |
296 | DPRINTF("IO error\n"); | |
297 | scsi_command_complete(r, ret); | |
298 | return; | |
299 | } | |
300 | ||
301 | scsi_command_complete(r, ret); | |
302 | } | |
303 | ||
304 | /* Write data to a scsi device. Returns nonzero on failure. | |
305 | The transfer may complete asynchronously. */ | |
306 | static int scsi_write_data(SCSIDevice *d, uint32_t tag) | |
307 | { | |
308 | SCSIDeviceState *s = d->state; | |
309 | SCSIRequest *r; | |
310 | int ret; | |
311 | ||
312 | DPRINTF("scsi_write_data 0x%x\n", tag); | |
313 | r = scsi_find_request(s, tag); | |
314 | if (!r) { | |
315 | BADF("Bad write tag 0x%x\n", tag); | |
316 | /* ??? This is the wrong error. */ | |
317 | scsi_command_complete(r, -EINVAL); | |
318 | return 0; | |
319 | } | |
320 | ||
321 | if (r->len == 0) { | |
322 | r->len = r->buflen; | |
323 | s->completion(s->opaque, SCSI_REASON_DATA, r->tag, r->len); | |
324 | return 0; | |
325 | } | |
326 | ||
327 | ret = execute_command(s->bdrv, r, SG_DXFER_TO_DEV, scsi_write_complete); | |
328 | if (ret == -1) { | |
329 | scsi_command_complete(r, -EINVAL); | |
330 | return 1; | |
331 | } | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
336 | /* Return a pointer to the data buffer. */ | |
337 | static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag) | |
338 | { | |
339 | SCSIDeviceState *s = d->state; | |
340 | SCSIRequest *r; | |
341 | r = scsi_find_request(s, tag); | |
342 | if (!r) { | |
343 | BADF("Bad buffer tag 0x%x\n", tag); | |
344 | return NULL; | |
345 | } | |
346 | return r->buf; | |
347 | } | |
348 | ||
349 | static int scsi_length(uint8_t *cmd, int blocksize, int *cmdlen, uint32_t *len) | |
350 | { | |
351 | switch (cmd[0] >> 5) { | |
352 | case 0: | |
353 | *len = cmd[4]; | |
354 | *cmdlen = 6; | |
355 | break; | |
356 | case 1: | |
357 | case 2: | |
358 | *len = cmd[8] | (cmd[7] << 8); | |
359 | *cmdlen = 10; | |
360 | break; | |
361 | case 4: | |
362 | *len = cmd[13] | (cmd[12] << 8) | (cmd[11] << 16) | (cmd[10] << 24); | |
363 | *cmdlen = 16; | |
364 | break; | |
365 | case 5: | |
366 | *len = cmd[9] | (cmd[8] << 8) | (cmd[7] << 16) | (cmd[6] << 24); | |
367 | *cmdlen = 12; | |
368 | break; | |
369 | default: | |
370 | return -1; | |
371 | } | |
372 | ||
373 | switch(cmd[0]) { | |
374 | case TEST_UNIT_READY: | |
375 | case REZERO_UNIT: | |
376 | case START_STOP: | |
377 | case SEEK_6: | |
378 | case WRITE_FILEMARKS: | |
379 | case SPACE: | |
380 | case ERASE: | |
381 | case ALLOW_MEDIUM_REMOVAL: | |
382 | case VERIFY: | |
383 | case SEEK_10: | |
384 | case SYNCHRONIZE_CACHE: | |
385 | case LOCK_UNLOCK_CACHE: | |
386 | case LOAD_UNLOAD: | |
387 | case SET_CD_SPEED: | |
388 | case SET_LIMITS: | |
389 | case WRITE_LONG: | |
390 | case MOVE_MEDIUM: | |
391 | case UPDATE_BLOCK: | |
392 | *len = 0; | |
393 | break; | |
394 | case MODE_SENSE: | |
395 | break; | |
396 | case WRITE_SAME: | |
397 | *len = 1; | |
398 | break; | |
399 | case READ_CAPACITY: | |
400 | *len = 8; | |
401 | break; | |
402 | case READ_BLOCK_LIMITS: | |
403 | *len = 6; | |
404 | break; | |
405 | case READ_POSITION: | |
406 | *len = 20; | |
407 | break; | |
408 | case SEND_VOLUME_TAG: | |
409 | *len *= 40; | |
410 | break; | |
411 | case MEDIUM_SCAN: | |
412 | *len *= 8; | |
413 | break; | |
414 | case WRITE_10: | |
415 | cmd[1] &= ~0x08; /* disable FUA */ | |
416 | case WRITE_VERIFY: | |
417 | case WRITE_6: | |
418 | case WRITE_12: | |
419 | case WRITE_VERIFY_12: | |
420 | *len *= blocksize; | |
421 | break; | |
422 | case READ_10: | |
423 | cmd[1] &= ~0x08; /* disable FUA */ | |
424 | case READ_6: | |
425 | case READ_REVERSE: | |
426 | case RECOVER_BUFFERED_DATA: | |
427 | case READ_12: | |
428 | *len *= blocksize; | |
429 | break; | |
430 | } | |
431 | return 0; | |
432 | } | |
433 | ||
434 | static int is_write(int command) | |
435 | { | |
436 | switch (command) { | |
437 | case COPY: | |
438 | case COPY_VERIFY: | |
439 | case COMPARE: | |
440 | case CHANGE_DEFINITION: | |
441 | case LOG_SELECT: | |
442 | case MODE_SELECT: | |
443 | case MODE_SELECT_10: | |
444 | case SEND_DIAGNOSTIC: | |
445 | case WRITE_BUFFER: | |
446 | case FORMAT_UNIT: | |
447 | case REASSIGN_BLOCKS: | |
448 | case RESERVE: | |
449 | case SEARCH_EQUAL: | |
450 | case SEARCH_HIGH: | |
451 | case SEARCH_LOW: | |
452 | case WRITE_6: | |
453 | case WRITE_10: | |
454 | case WRITE_VERIFY: | |
455 | case UPDATE_BLOCK: | |
456 | case WRITE_LONG: | |
457 | case WRITE_SAME: | |
458 | case SEARCH_HIGH_12: | |
459 | case SEARCH_EQUAL_12: | |
460 | case SEARCH_LOW_12: | |
461 | case WRITE_12: | |
462 | case WRITE_VERIFY_12: | |
463 | case SET_WINDOW: | |
464 | case MEDIUM_SCAN: | |
465 | case SEND_VOLUME_TAG: | |
466 | case WRITE_LONG_2: | |
467 | return 1; | |
468 | } | |
469 | return 0; | |
470 | } | |
471 | ||
472 | /* Execute a scsi command. Returns the length of the data expected by the | |
473 | command. This will be Positive for data transfers from the device | |
474 | (eg. disk reads), negative for transfers to the device (eg. disk writes), | |
475 | and zero if the command does not transfer any data. */ | |
476 | ||
477 | static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag, | |
478 | uint8_t *cmd, int lun) | |
479 | { | |
480 | SCSIDeviceState *s = d->state; | |
481 | uint32_t len; | |
482 | int cmdlen; | |
483 | SCSIRequest *r; | |
484 | int ret; | |
485 | ||
486 | /* ??? Tags are not unique for different luns. We only implement a | |
487 | single lun, so this should not matter. */ | |
488 | ||
489 | if (lun != s->lun || (cmd[1] >> 5) != s->lun) { | |
490 | DPRINTF("Unimplemented LUN %d\n", lun ? lun : cmd[1] >> 5); | |
491 | s->completion(s->opaque, SCSI_REASON_DONE, tag, ILLEGAL_REQUEST); | |
492 | return 0; | |
493 | } | |
494 | ||
495 | if (scsi_length(cmd, s->blocksize, &cmdlen, &len) == -1) { | |
496 | BADF("Unsupported command length, command %x\n", cmd[0]); | |
497 | return 0; | |
498 | } | |
499 | ||
500 | DPRINTF("Command: lun=%d tag=0x%x data=0x%02x len %d\n", lun, tag, | |
501 | cmd[0], len); | |
502 | ||
503 | r = scsi_find_request(s, tag); | |
504 | if (r) { | |
505 | BADF("Tag 0x%x already in use %p\n", tag, r); | |
506 | scsi_cancel_io(d, tag); | |
507 | } | |
508 | r = scsi_new_request(s, tag); | |
509 | ||
510 | memcpy(r->cmd, cmd, cmdlen); | |
511 | r->cmdlen = cmdlen; | |
512 | ||
513 | if (len == 0) { | |
514 | if (r->buf != NULL) | |
515 | free(r->buf); | |
516 | r->buflen = 0; | |
517 | r->buf = NULL; | |
518 | ret = execute_command(s->bdrv, r, SG_DXFER_NONE, scsi_command_complete); | |
519 | if (ret == -1) { | |
520 | scsi_command_complete(r, -EINVAL); | |
521 | return 0; | |
522 | } | |
523 | return 0; | |
524 | } | |
525 | ||
526 | if (r->buflen != len) { | |
527 | if (r->buf != NULL) | |
528 | free(r->buf); | |
529 | r->buf = qemu_malloc(len); | |
530 | r->buflen = len; | |
531 | } | |
532 | ||
533 | memset(r->buf, 0, r->buflen); | |
534 | r->len = len; | |
535 | if (is_write(cmd[0])) { | |
536 | r->len = 0; | |
537 | return -len; | |
538 | } | |
539 | ||
540 | return len; | |
541 | } | |
542 | ||
543 | static int get_blocksize(BlockDriverState *bdrv) | |
544 | { | |
545 | uint8_t cmd[10]; | |
546 | uint8_t buf[8]; | |
547 | uint8_t sensebuf[8]; | |
548 | sg_io_hdr_t io_header; | |
549 | int ret; | |
550 | ||
551 | memset(cmd, sizeof(cmd), 0); | |
552 | memset(buf, sizeof(buf), 0); | |
553 | cmd[0] = READ_CAPACITY; | |
554 | ||
555 | memset(&io_header, 0, sizeof(io_header)); | |
556 | io_header.interface_id = 'S'; | |
557 | io_header.dxfer_direction = SG_DXFER_FROM_DEV; | |
558 | io_header.dxfer_len = sizeof(buf); | |
559 | io_header.dxferp = buf; | |
560 | io_header.cmdp = cmd; | |
561 | io_header.cmd_len = sizeof(cmd); | |
562 | io_header.mx_sb_len = sizeof(sensebuf); | |
563 | io_header.sbp = sensebuf; | |
564 | io_header.timeout = 6000; /* XXX */ | |
565 | ||
566 | ret = bdrv_pwrite(bdrv, -1, &io_header, sizeof(io_header)); | |
567 | if (ret == -1) | |
568 | return -1; | |
569 | ||
570 | while ((ret = bdrv_pread(bdrv, -1, &io_header, sizeof(io_header))) == -1 && | |
571 | errno == EINTR); | |
572 | ||
573 | if (ret == -1) | |
574 | return -1; | |
575 | ||
576 | return (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; | |
577 | } | |
578 | ||
579 | static void scsi_destroy(SCSIDevice *d) | |
580 | { | |
581 | SCSIRequest *r, *n; | |
582 | ||
583 | r = d->state->requests; | |
584 | while (r) { | |
585 | n = r->next; | |
586 | qemu_free(r); | |
587 | r = n; | |
588 | } | |
589 | ||
590 | r = free_requests; | |
591 | while (r) { | |
592 | n = r->next; | |
593 | qemu_free(r); | |
594 | r = n; | |
595 | } | |
596 | ||
597 | qemu_free(d->state); | |
598 | qemu_free(d); | |
599 | } | |
600 | ||
601 | SCSIDevice *scsi_generic_init(BlockDriverState *bdrv, int tcq, | |
602 | scsi_completionfn completion, void *opaque) | |
603 | { | |
604 | int sg_version; | |
605 | SCSIDevice *d; | |
606 | SCSIDeviceState *s; | |
607 | struct sg_scsi_id scsiid; | |
608 | ||
609 | /* check we are really using a /dev/sg* file */ | |
610 | ||
611 | if (!bdrv_is_sg(bdrv)) | |
612 | return NULL; | |
613 | ||
614 | /* check we are using a driver managing SG_IO (version 3 and after */ | |
615 | ||
616 | if (bdrv_ioctl(bdrv, SG_GET_VERSION_NUM, &sg_version) < 0 || | |
617 | sg_version < 30000) | |
618 | return NULL; | |
619 | ||
620 | /* get LUN of the /dev/sg? */ | |
621 | ||
622 | if (bdrv_ioctl(bdrv, SG_GET_SCSI_ID, &scsiid)) | |
623 | return NULL; | |
624 | ||
625 | /* define device state */ | |
626 | ||
627 | s = (SCSIDeviceState *)qemu_mallocz(sizeof(SCSIDeviceState)); | |
628 | s->bdrv = bdrv; | |
629 | s->requests = NULL; | |
630 | s->completion = completion; | |
631 | s->opaque = opaque; | |
632 | s->lun = scsiid.lun; | |
633 | s->blocksize = get_blocksize(s->bdrv); | |
634 | s->driver_status = 0; | |
635 | memset(s->sensebuf, 0, sizeof(s->sensebuf)); | |
636 | /* removable media returns 0 if not present */ | |
637 | if (s->blocksize <= 0) | |
638 | s->blocksize = 2048; | |
639 | ||
640 | /* define function to manage device */ | |
641 | ||
642 | d = (SCSIDevice *)qemu_mallocz(sizeof(SCSIDevice)); | |
643 | d->state = s; | |
644 | d->destroy = scsi_destroy; | |
645 | d->send_command = scsi_send_command; | |
646 | d->read_data = scsi_read_data; | |
647 | d->write_data = scsi_write_data; | |
648 | d->cancel_io = scsi_cancel_io; | |
649 | d->get_buf = scsi_get_buf; | |
650 | ||
651 | return d; | |
652 | } | |
653 | #endif /* __linux__ */ |