root / hw / scsi-disk.c @ c4470b25
History | View | Annotate | Download (31.2 kB)
1 |
/*
|
---|---|
2 |
* SCSI Device emulation
|
3 |
*
|
4 |
* Copyright (c) 2006 CodeSourcery.
|
5 |
* Based on code by Fabrice Bellard
|
6 |
*
|
7 |
* Written by Paul Brook
|
8 |
*
|
9 |
* This code is licenced under the LGPL.
|
10 |
*
|
11 |
* Note that this file only handles the SCSI architecture model and device
|
12 |
* commands. Emulation of interface/link layer protocols is handled by
|
13 |
* the host adapter emulator.
|
14 |
*/
|
15 |
|
16 |
#include <qemu-common.h> |
17 |
#include <sysemu.h> |
18 |
//#define DEBUG_SCSI
|
19 |
|
20 |
#ifdef DEBUG_SCSI
|
21 |
#define DPRINTF(fmt, ...) \
|
22 |
do { printf("scsi-disk: " fmt , ## __VA_ARGS__); } while (0) |
23 |
#else
|
24 |
#define DPRINTF(fmt, ...) do {} while(0) |
25 |
#endif
|
26 |
|
27 |
#define BADF(fmt, ...) \
|
28 |
do { fprintf(stderr, "scsi-disk: " fmt , ## __VA_ARGS__); } while (0) |
29 |
|
30 |
#include "qemu-common.h" |
31 |
#include "block.h" |
32 |
#include "scsi-disk.h" |
33 |
|
34 |
#define SENSE_NO_SENSE 0 |
35 |
#define SENSE_NOT_READY 2 |
36 |
#define SENSE_HARDWARE_ERROR 4 |
37 |
#define SENSE_ILLEGAL_REQUEST 5 |
38 |
|
39 |
#define STATUS_GOOD 0 |
40 |
#define STATUS_CHECK_CONDITION 2 |
41 |
|
42 |
#define SCSI_DMA_BUF_SIZE 131072 |
43 |
#define SCSI_MAX_INQUIRY_LEN 256 |
44 |
|
45 |
#define SCSI_REQ_STATUS_RETRY 0x01 |
46 |
|
47 |
typedef struct SCSIRequest { |
48 |
SCSIDeviceState *dev; |
49 |
uint32_t tag; |
50 |
/* ??? We should probably keep track of whether the data transfer is
|
51 |
a read or a write. Currently we rely on the host getting it right. */
|
52 |
/* Both sector and sector_count are in terms of qemu 512 byte blocks. */
|
53 |
uint64_t sector; |
54 |
uint32_t sector_count; |
55 |
struct iovec iov;
|
56 |
QEMUIOVector qiov; |
57 |
BlockDriverAIOCB *aiocb; |
58 |
struct SCSIRequest *next;
|
59 |
uint32_t status; |
60 |
} SCSIRequest; |
61 |
|
62 |
struct SCSIDeviceState
|
63 |
{ |
64 |
BlockDriverState *bdrv; |
65 |
SCSIRequest *requests; |
66 |
/* The qemu block layer uses a fixed 512 byte sector size.
|
67 |
This is the number of 512 byte blocks in a single scsi sector. */
|
68 |
int cluster_size;
|
69 |
uint64_t max_lba; |
70 |
int sense;
|
71 |
int tcq;
|
72 |
/* Completion functions may be called from either scsi_{read,write}_data
|
73 |
or from the AIO completion routines. */
|
74 |
scsi_completionfn completion; |
75 |
void *opaque;
|
76 |
char drive_serial_str[21]; |
77 |
QEMUBH *bh; |
78 |
}; |
79 |
|
80 |
/* Global pool of SCSIRequest structures. */
|
81 |
static SCSIRequest *free_requests = NULL; |
82 |
|
83 |
static SCSIRequest *scsi_new_request(SCSIDeviceState *s, uint32_t tag)
|
84 |
{ |
85 |
SCSIRequest *r; |
86 |
|
87 |
if (free_requests) {
|
88 |
r = free_requests; |
89 |
free_requests = r->next; |
90 |
} else {
|
91 |
r = qemu_malloc(sizeof(SCSIRequest));
|
92 |
r->iov.iov_base = qemu_memalign(512, SCSI_DMA_BUF_SIZE);
|
93 |
} |
94 |
r->dev = s; |
95 |
r->tag = tag; |
96 |
r->sector_count = 0;
|
97 |
r->iov.iov_len = 0;
|
98 |
r->aiocb = NULL;
|
99 |
r->status = 0;
|
100 |
|
101 |
r->next = s->requests; |
102 |
s->requests = r; |
103 |
return r;
|
104 |
} |
105 |
|
106 |
static void scsi_remove_request(SCSIRequest *r) |
107 |
{ |
108 |
SCSIRequest *last; |
109 |
SCSIDeviceState *s = r->dev; |
110 |
|
111 |
if (s->requests == r) {
|
112 |
s->requests = r->next; |
113 |
} else {
|
114 |
last = s->requests; |
115 |
while (last && last->next != r)
|
116 |
last = last->next; |
117 |
if (last) {
|
118 |
last->next = r->next; |
119 |
} else {
|
120 |
BADF("Orphaned request\n");
|
121 |
} |
122 |
} |
123 |
r->next = free_requests; |
124 |
free_requests = r; |
125 |
} |
126 |
|
127 |
static SCSIRequest *scsi_find_request(SCSIDeviceState *s, uint32_t tag)
|
128 |
{ |
129 |
SCSIRequest *r; |
130 |
|
131 |
r = s->requests; |
132 |
while (r && r->tag != tag)
|
133 |
r = r->next; |
134 |
|
135 |
return r;
|
136 |
} |
137 |
|
138 |
/* Helper function for command completion. */
|
139 |
static void scsi_command_complete(SCSIRequest *r, int status, int sense) |
140 |
{ |
141 |
SCSIDeviceState *s = r->dev; |
142 |
uint32_t tag; |
143 |
DPRINTF("Command complete tag=0x%x status=%d sense=%d\n", r->tag, status, sense);
|
144 |
s->sense = sense; |
145 |
tag = r->tag; |
146 |
scsi_remove_request(r); |
147 |
s->completion(s->opaque, SCSI_REASON_DONE, tag, status); |
148 |
} |
149 |
|
150 |
/* Cancel a pending data transfer. */
|
151 |
static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) |
152 |
{ |
153 |
SCSIDeviceState *s = d->state; |
154 |
SCSIRequest *r; |
155 |
DPRINTF("Cancel tag=0x%x\n", tag);
|
156 |
r = scsi_find_request(s, tag); |
157 |
if (r) {
|
158 |
if (r->aiocb)
|
159 |
bdrv_aio_cancel(r->aiocb); |
160 |
r->aiocb = NULL;
|
161 |
scsi_remove_request(r); |
162 |
} |
163 |
} |
164 |
|
165 |
static void scsi_read_complete(void * opaque, int ret) |
166 |
{ |
167 |
SCSIRequest *r = (SCSIRequest *)opaque; |
168 |
SCSIDeviceState *s = r->dev; |
169 |
|
170 |
if (ret) {
|
171 |
DPRINTF("IO error\n");
|
172 |
s->completion(s->opaque, SCSI_REASON_DATA, r->tag, 0);
|
173 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NO_SENSE); |
174 |
return;
|
175 |
} |
176 |
DPRINTF("Data ready tag=0x%x len=%" PRId64 "\n", r->tag, r->iov.iov_len); |
177 |
|
178 |
s->completion(s->opaque, SCSI_REASON_DATA, r->tag, r->iov.iov_len); |
179 |
} |
180 |
|
181 |
/* Read more data from scsi device into buffer. */
|
182 |
static void scsi_read_data(SCSIDevice *d, uint32_t tag) |
183 |
{ |
184 |
SCSIDeviceState *s = d->state; |
185 |
SCSIRequest *r; |
186 |
uint32_t n; |
187 |
|
188 |
r = scsi_find_request(s, tag); |
189 |
if (!r) {
|
190 |
BADF("Bad read tag 0x%x\n", tag);
|
191 |
/* ??? This is the wrong error. */
|
192 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR); |
193 |
return;
|
194 |
} |
195 |
if (r->sector_count == (uint32_t)-1) { |
196 |
DPRINTF("Read buf_len=%" PRId64 "\n", r->iov.iov_len); |
197 |
r->sector_count = 0;
|
198 |
s->completion(s->opaque, SCSI_REASON_DATA, r->tag, r->iov.iov_len); |
199 |
return;
|
200 |
} |
201 |
DPRINTF("Read sector_count=%d\n", r->sector_count);
|
202 |
if (r->sector_count == 0) { |
203 |
scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE); |
204 |
return;
|
205 |
} |
206 |
|
207 |
n = r->sector_count; |
208 |
if (n > SCSI_DMA_BUF_SIZE / 512) |
209 |
n = SCSI_DMA_BUF_SIZE / 512;
|
210 |
|
211 |
r->iov.iov_len = n * 512;
|
212 |
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
|
213 |
r->aiocb = bdrv_aio_readv(s->bdrv, r->sector, &r->qiov, n, |
214 |
scsi_read_complete, r); |
215 |
if (r->aiocb == NULL) |
216 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR); |
217 |
r->sector += n; |
218 |
r->sector_count -= n; |
219 |
} |
220 |
|
221 |
static int scsi_handle_write_error(SCSIRequest *r, int error) |
222 |
{ |
223 |
BlockInterfaceErrorAction action = drive_get_onerror(r->dev->bdrv); |
224 |
|
225 |
if (action == BLOCK_ERR_IGNORE)
|
226 |
return 0; |
227 |
|
228 |
if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC)
|
229 |
|| action == BLOCK_ERR_STOP_ANY) { |
230 |
r->status |= SCSI_REQ_STATUS_RETRY; |
231 |
vm_stop(0);
|
232 |
} else {
|
233 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, |
234 |
SENSE_HARDWARE_ERROR); |
235 |
} |
236 |
|
237 |
return 1; |
238 |
} |
239 |
|
240 |
static void scsi_write_complete(void * opaque, int ret) |
241 |
{ |
242 |
SCSIRequest *r = (SCSIRequest *)opaque; |
243 |
SCSIDeviceState *s = r->dev; |
244 |
uint32_t len; |
245 |
uint32_t n; |
246 |
|
247 |
r->aiocb = NULL;
|
248 |
|
249 |
if (ret) {
|
250 |
if (scsi_handle_write_error(r, -ret))
|
251 |
return;
|
252 |
} |
253 |
|
254 |
n = r->iov.iov_len / 512;
|
255 |
r->sector += n; |
256 |
r->sector_count -= n; |
257 |
if (r->sector_count == 0) { |
258 |
scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE); |
259 |
} else {
|
260 |
len = r->sector_count * 512;
|
261 |
if (len > SCSI_DMA_BUF_SIZE) {
|
262 |
len = SCSI_DMA_BUF_SIZE; |
263 |
} |
264 |
r->iov.iov_len = len; |
265 |
DPRINTF("Write complete tag=0x%x more=%d\n", r->tag, len);
|
266 |
s->completion(s->opaque, SCSI_REASON_DATA, r->tag, len); |
267 |
} |
268 |
} |
269 |
|
270 |
static void scsi_write_request(SCSIRequest *r) |
271 |
{ |
272 |
SCSIDeviceState *s = r->dev; |
273 |
uint32_t n; |
274 |
|
275 |
n = r->iov.iov_len / 512;
|
276 |
if (n) {
|
277 |
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
|
278 |
r->aiocb = bdrv_aio_writev(s->bdrv, r->sector, &r->qiov, n, |
279 |
scsi_write_complete, r); |
280 |
if (r->aiocb == NULL) |
281 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, |
282 |
SENSE_HARDWARE_ERROR); |
283 |
} else {
|
284 |
/* Invoke completion routine to fetch data from host. */
|
285 |
scsi_write_complete(r, 0);
|
286 |
} |
287 |
} |
288 |
|
289 |
/* Write data to a scsi device. Returns nonzero on failure.
|
290 |
The transfer may complete asynchronously. */
|
291 |
static int scsi_write_data(SCSIDevice *d, uint32_t tag) |
292 |
{ |
293 |
SCSIDeviceState *s = d->state; |
294 |
SCSIRequest *r; |
295 |
|
296 |
DPRINTF("Write data tag=0x%x\n", tag);
|
297 |
r = scsi_find_request(s, tag); |
298 |
if (!r) {
|
299 |
BADF("Bad write tag 0x%x\n", tag);
|
300 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR); |
301 |
return 1; |
302 |
} |
303 |
|
304 |
if (r->aiocb)
|
305 |
BADF("Data transfer already in progress\n");
|
306 |
|
307 |
scsi_write_request(r); |
308 |
|
309 |
return 0; |
310 |
} |
311 |
|
312 |
static void scsi_dma_restart_bh(void *opaque) |
313 |
{ |
314 |
SCSIDeviceState *s = opaque; |
315 |
SCSIRequest *r = s->requests; |
316 |
|
317 |
qemu_bh_delete(s->bh); |
318 |
s->bh = NULL;
|
319 |
|
320 |
while (r) {
|
321 |
if (r->status & SCSI_REQ_STATUS_RETRY) {
|
322 |
r->status &= ~SCSI_REQ_STATUS_RETRY; |
323 |
scsi_write_request(r); |
324 |
} |
325 |
r = r->next; |
326 |
} |
327 |
} |
328 |
|
329 |
static void scsi_dma_restart_cb(void *opaque, int running, int reason) |
330 |
{ |
331 |
SCSIDeviceState *s = opaque; |
332 |
|
333 |
if (!running)
|
334 |
return;
|
335 |
|
336 |
if (!s->bh) {
|
337 |
s->bh = qemu_bh_new(scsi_dma_restart_bh, s); |
338 |
qemu_bh_schedule(s->bh); |
339 |
} |
340 |
} |
341 |
|
342 |
/* Return a pointer to the data buffer. */
|
343 |
static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
|
344 |
{ |
345 |
SCSIDeviceState *s = d->state; |
346 |
SCSIRequest *r; |
347 |
|
348 |
r = scsi_find_request(s, tag); |
349 |
if (!r) {
|
350 |
BADF("Bad buffer tag 0x%x\n", tag);
|
351 |
return NULL; |
352 |
} |
353 |
return (uint8_t *)r->iov.iov_base;
|
354 |
} |
355 |
|
356 |
/* Execute a scsi command. Returns the length of the data expected by the
|
357 |
command. This will be Positive for data transfers from the device
|
358 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
359 |
and zero if the command does not transfer any data. */
|
360 |
|
361 |
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
|
362 |
uint8_t *buf, int lun)
|
363 |
{ |
364 |
SCSIDeviceState *s = d->state; |
365 |
uint64_t nb_sectors; |
366 |
uint64_t lba; |
367 |
uint32_t len; |
368 |
int cmdlen;
|
369 |
int is_write;
|
370 |
uint8_t command; |
371 |
uint8_t *outbuf; |
372 |
SCSIRequest *r; |
373 |
|
374 |
command = buf[0];
|
375 |
r = scsi_find_request(s, tag); |
376 |
if (r) {
|
377 |
BADF("Tag 0x%x already in use\n", tag);
|
378 |
scsi_cancel_io(d, tag); |
379 |
} |
380 |
/* ??? Tags are not unique for different luns. We only implement a
|
381 |
single lun, so this should not matter. */
|
382 |
r = scsi_new_request(s, tag); |
383 |
outbuf = (uint8_t *)r->iov.iov_base; |
384 |
is_write = 0;
|
385 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
386 |
switch (command >> 5) { |
387 |
case 0: |
388 |
lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) | |
389 |
(((uint64_t) buf[1] & 0x1f) << 16); |
390 |
len = buf[4];
|
391 |
cmdlen = 6;
|
392 |
break;
|
393 |
case 1: |
394 |
case 2: |
395 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
396 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
397 |
len = buf[8] | (buf[7] << 8); |
398 |
cmdlen = 10;
|
399 |
break;
|
400 |
case 4: |
401 |
lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) | |
402 |
((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) | |
403 |
((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) | |
404 |
((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56); |
405 |
len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24); |
406 |
cmdlen = 16;
|
407 |
break;
|
408 |
case 5: |
409 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
410 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
411 |
len = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24); |
412 |
cmdlen = 12;
|
413 |
break;
|
414 |
default:
|
415 |
BADF("Unsupported command length, command %x\n", command);
|
416 |
goto fail;
|
417 |
} |
418 |
#ifdef DEBUG_SCSI
|
419 |
{ |
420 |
int i;
|
421 |
for (i = 1; i < cmdlen; i++) { |
422 |
printf(" 0x%02x", buf[i]);
|
423 |
} |
424 |
printf("\n");
|
425 |
} |
426 |
#endif
|
427 |
if (lun || buf[1] >> 5) { |
428 |
/* Only LUN 0 supported. */
|
429 |
DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5); |
430 |
if (command != 0x03 && command != 0x12) /* REQUEST SENSE and INQUIRY */ |
431 |
goto fail;
|
432 |
} |
433 |
switch (command) {
|
434 |
case 0x0: |
435 |
DPRINTF("Test Unit Ready\n");
|
436 |
if (!bdrv_is_inserted(s->bdrv))
|
437 |
goto notready;
|
438 |
break;
|
439 |
case 0x03: |
440 |
DPRINTF("Request Sense (len %d)\n", len);
|
441 |
if (len < 4) |
442 |
goto fail;
|
443 |
memset(outbuf, 0, 4); |
444 |
r->iov.iov_len = 4;
|
445 |
if (s->sense == SENSE_NOT_READY && len >= 18) { |
446 |
memset(outbuf, 0, 18); |
447 |
r->iov.iov_len = 18;
|
448 |
outbuf[7] = 10; |
449 |
/* asc 0x3a, ascq 0: Medium not present */
|
450 |
outbuf[12] = 0x3a; |
451 |
outbuf[13] = 0; |
452 |
} |
453 |
outbuf[0] = 0xf0; |
454 |
outbuf[1] = 0; |
455 |
outbuf[2] = s->sense;
|
456 |
break;
|
457 |
case 0x12: |
458 |
DPRINTF("Inquiry (len %d)\n", len);
|
459 |
if (buf[1] & 0x2) { |
460 |
/* Command support data - optional, not implemented */
|
461 |
BADF("optional INQUIRY command support request not implemented\n");
|
462 |
goto fail;
|
463 |
} |
464 |
else if (buf[1] & 0x1) { |
465 |
/* Vital product data */
|
466 |
uint8_t page_code = buf[2];
|
467 |
if (len < 4) { |
468 |
BADF("Error: Inquiry (EVPD[%02X]) buffer size %d is "
|
469 |
"less than 4\n", page_code, len);
|
470 |
goto fail;
|
471 |
} |
472 |
|
473 |
switch (page_code) {
|
474 |
case 0x00: |
475 |
{ |
476 |
/* Supported page codes, mandatory */
|
477 |
DPRINTF("Inquiry EVPD[Supported pages] "
|
478 |
"buffer size %d\n", len);
|
479 |
|
480 |
r->iov.iov_len = 0;
|
481 |
|
482 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
483 |
outbuf[r->iov.iov_len++] = 5;
|
484 |
} else {
|
485 |
outbuf[r->iov.iov_len++] = 0;
|
486 |
} |
487 |
|
488 |
outbuf[r->iov.iov_len++] = 0x00; // this page |
489 |
outbuf[r->iov.iov_len++] = 0x00;
|
490 |
outbuf[r->iov.iov_len++] = 3; // number of pages |
491 |
outbuf[r->iov.iov_len++] = 0x00; // list of supported pages (this page) |
492 |
outbuf[r->iov.iov_len++] = 0x80; // unit serial number |
493 |
outbuf[r->iov.iov_len++] = 0x83; // device identification |
494 |
} |
495 |
break;
|
496 |
case 0x80: |
497 |
{ |
498 |
int l;
|
499 |
|
500 |
/* Device serial number, optional */
|
501 |
if (len < 4) { |
502 |
BADF("Error: EVPD[Serial number] Inquiry buffer "
|
503 |
"size %d too small, %d needed\n", len, 4); |
504 |
goto fail;
|
505 |
} |
506 |
|
507 |
DPRINTF("Inquiry EVPD[Serial number] buffer size %d\n", len);
|
508 |
l = MIN(len, strlen(s->drive_serial_str)); |
509 |
|
510 |
r->iov.iov_len = 0;
|
511 |
|
512 |
/* Supported page codes */
|
513 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
514 |
outbuf[r->iov.iov_len++] = 5;
|
515 |
} else {
|
516 |
outbuf[r->iov.iov_len++] = 0;
|
517 |
} |
518 |
|
519 |
outbuf[r->iov.iov_len++] = 0x80; // this page |
520 |
outbuf[r->iov.iov_len++] = 0x00;
|
521 |
outbuf[r->iov.iov_len++] = l; |
522 |
memcpy(&outbuf[r->iov.iov_len], s->drive_serial_str, l); |
523 |
r->iov.iov_len += l; |
524 |
} |
525 |
|
526 |
break;
|
527 |
case 0x83: |
528 |
{ |
529 |
/* Device identification page, mandatory */
|
530 |
int max_len = 255 - 8; |
531 |
int id_len = strlen(bdrv_get_device_name(s->bdrv));
|
532 |
if (id_len > max_len)
|
533 |
id_len = max_len; |
534 |
|
535 |
DPRINTF("Inquiry EVPD[Device identification] "
|
536 |
"buffer size %d\n", len);
|
537 |
r->iov.iov_len = 0;
|
538 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
539 |
outbuf[r->iov.iov_len++] = 5;
|
540 |
} else {
|
541 |
outbuf[r->iov.iov_len++] = 0;
|
542 |
} |
543 |
|
544 |
outbuf[r->iov.iov_len++] = 0x83; // this page |
545 |
outbuf[r->iov.iov_len++] = 0x00;
|
546 |
outbuf[r->iov.iov_len++] = 3 + id_len;
|
547 |
|
548 |
outbuf[r->iov.iov_len++] = 0x2; // ASCII |
549 |
outbuf[r->iov.iov_len++] = 0; // not officially assigned |
550 |
outbuf[r->iov.iov_len++] = 0; // reserved |
551 |
outbuf[r->iov.iov_len++] = id_len; // length of data following
|
552 |
|
553 |
memcpy(&outbuf[r->iov.iov_len], |
554 |
bdrv_get_device_name(s->bdrv), id_len); |
555 |
r->iov.iov_len += id_len; |
556 |
} |
557 |
break;
|
558 |
default:
|
559 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
560 |
"buffer size %d\n", page_code, len);
|
561 |
goto fail;
|
562 |
} |
563 |
/* done with EVPD */
|
564 |
break;
|
565 |
} |
566 |
else {
|
567 |
/* Standard INQUIRY data */
|
568 |
if (buf[2] != 0) { |
569 |
BADF("Error: Inquiry (STANDARD) page or code "
|
570 |
"is non-zero [%02X]\n", buf[2]); |
571 |
goto fail;
|
572 |
} |
573 |
|
574 |
/* PAGE CODE == 0 */
|
575 |
if (len < 5) { |
576 |
BADF("Error: Inquiry (STANDARD) buffer size %d "
|
577 |
"is less than 5\n", len);
|
578 |
goto fail;
|
579 |
} |
580 |
|
581 |
if (len < 36) { |
582 |
BADF("Error: Inquiry (STANDARD) buffer size %d "
|
583 |
"is less than 36 (TODO: only 5 required)\n", len);
|
584 |
} |
585 |
} |
586 |
|
587 |
if(len > SCSI_MAX_INQUIRY_LEN)
|
588 |
len = SCSI_MAX_INQUIRY_LEN; |
589 |
|
590 |
memset(outbuf, 0, len);
|
591 |
|
592 |
if (lun || buf[1] >> 5) { |
593 |
outbuf[0] = 0x7f; /* LUN not supported */ |
594 |
} else if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) { |
595 |
outbuf[0] = 5; |
596 |
outbuf[1] = 0x80; |
597 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
598 |
} else {
|
599 |
outbuf[0] = 0; |
600 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
601 |
} |
602 |
memcpy(&outbuf[8], "QEMU ", 8); |
603 |
memcpy(&outbuf[32], QEMU_VERSION, 4); |
604 |
/* Identify device as SCSI-3 rev 1.
|
605 |
Some later commands are also implemented. */
|
606 |
outbuf[2] = 3; |
607 |
outbuf[3] = 2; /* Format 2 */ |
608 |
outbuf[4] = len - 5; /* Additional Length = (Len - 1) - 4 */ |
609 |
/* Sync data transfer and TCQ. */
|
610 |
outbuf[7] = 0x10 | (s->tcq ? 0x02 : 0); |
611 |
r->iov.iov_len = len; |
612 |
break;
|
613 |
case 0x16: |
614 |
DPRINTF("Reserve(6)\n");
|
615 |
if (buf[1] & 1) |
616 |
goto fail;
|
617 |
break;
|
618 |
case 0x17: |
619 |
DPRINTF("Release(6)\n");
|
620 |
if (buf[1] & 1) |
621 |
goto fail;
|
622 |
break;
|
623 |
case 0x1a: |
624 |
case 0x5a: |
625 |
{ |
626 |
uint8_t *p; |
627 |
int page;
|
628 |
|
629 |
page = buf[2] & 0x3f; |
630 |
DPRINTF("Mode Sense (page %d, len %d)\n", page, len);
|
631 |
p = outbuf; |
632 |
memset(p, 0, 4); |
633 |
outbuf[1] = 0; /* Default media type. */ |
634 |
outbuf[3] = 0; /* Block descriptor length. */ |
635 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
636 |
outbuf[2] = 0x80; /* Readonly. */ |
637 |
} |
638 |
p += 4;
|
639 |
if (page == 4) { |
640 |
int cylinders, heads, secs;
|
641 |
|
642 |
/* Rigid disk device geometry page. */
|
643 |
p[0] = 4; |
644 |
p[1] = 0x16; |
645 |
/* if a geometry hint is available, use it */
|
646 |
bdrv_get_geometry_hint(s->bdrv, &cylinders, &heads, &secs); |
647 |
p[2] = (cylinders >> 16) & 0xff; |
648 |
p[3] = (cylinders >> 8) & 0xff; |
649 |
p[4] = cylinders & 0xff; |
650 |
p[5] = heads & 0xff; |
651 |
/* Write precomp start cylinder, disabled */
|
652 |
p[6] = (cylinders >> 16) & 0xff; |
653 |
p[7] = (cylinders >> 8) & 0xff; |
654 |
p[8] = cylinders & 0xff; |
655 |
/* Reduced current start cylinder, disabled */
|
656 |
p[9] = (cylinders >> 16) & 0xff; |
657 |
p[10] = (cylinders >> 8) & 0xff; |
658 |
p[11] = cylinders & 0xff; |
659 |
/* Device step rate [ns], 200ns */
|
660 |
p[12] = 0; |
661 |
p[13] = 200; |
662 |
/* Landing zone cylinder */
|
663 |
p[14] = 0xff; |
664 |
p[15] = 0xff; |
665 |
p[16] = 0xff; |
666 |
/* Medium rotation rate [rpm], 5400 rpm */
|
667 |
p[20] = (5400 >> 8) & 0xff; |
668 |
p[21] = 5400 & 0xff; |
669 |
p += 0x16;
|
670 |
} else if (page == 5) { |
671 |
int cylinders, heads, secs;
|
672 |
|
673 |
/* Flexible disk device geometry page. */
|
674 |
p[0] = 5; |
675 |
p[1] = 0x1e; |
676 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
677 |
p[2] = 5000 >> 8; |
678 |
p[3] = 5000 & 0xff; |
679 |
/* if a geometry hint is available, use it */
|
680 |
bdrv_get_geometry_hint(s->bdrv, &cylinders, &heads, &secs); |
681 |
p[4] = heads & 0xff; |
682 |
p[5] = secs & 0xff; |
683 |
p[6] = s->cluster_size * 2; |
684 |
p[8] = (cylinders >> 8) & 0xff; |
685 |
p[9] = cylinders & 0xff; |
686 |
/* Write precomp start cylinder, disabled */
|
687 |
p[10] = (cylinders >> 8) & 0xff; |
688 |
p[11] = cylinders & 0xff; |
689 |
/* Reduced current start cylinder, disabled */
|
690 |
p[12] = (cylinders >> 8) & 0xff; |
691 |
p[13] = cylinders & 0xff; |
692 |
/* Device step rate [100us], 100us */
|
693 |
p[14] = 0; |
694 |
p[15] = 1; |
695 |
/* Device step pulse width [us], 1us */
|
696 |
p[16] = 1; |
697 |
/* Device head settle delay [100us], 100us */
|
698 |
p[17] = 0; |
699 |
p[18] = 1; |
700 |
/* Motor on delay [0.1s], 0.1s */
|
701 |
p[19] = 1; |
702 |
/* Motor off delay [0.1s], 0.1s */
|
703 |
p[20] = 1; |
704 |
/* Medium rotation rate [rpm], 5400 rpm */
|
705 |
p[28] = (5400 >> 8) & 0xff; |
706 |
p[29] = 5400 & 0xff; |
707 |
p += 0x1e;
|
708 |
} else if ((page == 8 || page == 0x3f)) { |
709 |
/* Caching page. */
|
710 |
memset(p,0,20); |
711 |
p[0] = 8; |
712 |
p[1] = 0x12; |
713 |
p[2] = 4; /* WCE */ |
714 |
p += 20;
|
715 |
} |
716 |
if ((page == 0x3f || page == 0x2a) |
717 |
&& (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM)) { |
718 |
/* CD Capabilities and Mechanical Status page. */
|
719 |
p[0] = 0x2a; |
720 |
p[1] = 0x14; |
721 |
p[2] = 3; // CD-R & CD-RW read |
722 |
p[3] = 0; // Writing not supported |
723 |
p[4] = 0x7f; /* Audio, composite, digital out, |
724 |
mode 2 form 1&2, multi session */
|
725 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
726 |
RW corrected, C2 errors, ISRC,
|
727 |
UPC, Bar code */
|
728 |
p[6] = 0x2d | (bdrv_is_locked(s->bdrv)? 2 : 0); |
729 |
/* Locking supported, jumper present, eject, tray */
|
730 |
p[7] = 0; /* no volume & mute control, no |
731 |
changer */
|
732 |
p[8] = (50 * 176) >> 8; // 50x read speed |
733 |
p[9] = (50 * 176) & 0xff; |
734 |
p[10] = 0 >> 8; // No volume |
735 |
p[11] = 0 & 0xff; |
736 |
p[12] = 2048 >> 8; // 2M buffer |
737 |
p[13] = 2048 & 0xff; |
738 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
739 |
p[15] = (16 * 176) & 0xff; |
740 |
p[18] = (16 * 176) >> 8; // 16x write speed |
741 |
p[19] = (16 * 176) & 0xff; |
742 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
743 |
p[21] = (16 * 176) & 0xff; |
744 |
p += 22;
|
745 |
} |
746 |
r->iov.iov_len = p - outbuf; |
747 |
outbuf[0] = r->iov.iov_len - 4; |
748 |
if (r->iov.iov_len > len)
|
749 |
r->iov.iov_len = len; |
750 |
} |
751 |
break;
|
752 |
case 0x1b: |
753 |
DPRINTF("Start Stop Unit\n");
|
754 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM &&
|
755 |
(buf[4] & 2)) |
756 |
/* load/eject medium */
|
757 |
bdrv_eject(s->bdrv, !(buf[4] & 1)); |
758 |
break;
|
759 |
case 0x1e: |
760 |
DPRINTF("Prevent Allow Medium Removal (prevent = %d)\n", buf[4] & 3); |
761 |
bdrv_set_locked(s->bdrv, buf[4] & 1); |
762 |
break;
|
763 |
case 0x25: |
764 |
DPRINTF("Read Capacity\n");
|
765 |
/* The normal LEN field for this command is zero. */
|
766 |
memset(outbuf, 0, 8); |
767 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
768 |
nb_sectors /= s->cluster_size; |
769 |
/* Returned value is the address of the last sector. */
|
770 |
if (nb_sectors) {
|
771 |
nb_sectors--; |
772 |
/* Remember the new size for read/write sanity checking. */
|
773 |
s->max_lba = nb_sectors; |
774 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
775 |
if (nb_sectors > UINT32_MAX)
|
776 |
nb_sectors = UINT32_MAX; |
777 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
778 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
779 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
780 |
outbuf[3] = nb_sectors & 0xff; |
781 |
outbuf[4] = 0; |
782 |
outbuf[5] = 0; |
783 |
outbuf[6] = s->cluster_size * 2; |
784 |
outbuf[7] = 0; |
785 |
r->iov.iov_len = 8;
|
786 |
} else {
|
787 |
notready:
|
788 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NOT_READY); |
789 |
return 0; |
790 |
} |
791 |
break;
|
792 |
case 0x08: |
793 |
case 0x28: |
794 |
case 0x88: |
795 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", lba, len); |
796 |
if (lba > s->max_lba)
|
797 |
goto illegal_lba;
|
798 |
r->sector = lba * s->cluster_size; |
799 |
r->sector_count = len * s->cluster_size; |
800 |
break;
|
801 |
case 0x0a: |
802 |
case 0x2a: |
803 |
case 0x8a: |
804 |
DPRINTF("Write (sector %" PRId64 ", count %d)\n", lba, len); |
805 |
if (lba > s->max_lba)
|
806 |
goto illegal_lba;
|
807 |
r->sector = lba * s->cluster_size; |
808 |
r->sector_count = len * s->cluster_size; |
809 |
is_write = 1;
|
810 |
break;
|
811 |
case 0x35: |
812 |
DPRINTF("Synchronise cache (sector %" PRId64 ", count %d)\n", lba, len); |
813 |
bdrv_flush(s->bdrv); |
814 |
break;
|
815 |
case 0x43: |
816 |
{ |
817 |
int start_track, format, msf, toclen;
|
818 |
|
819 |
msf = buf[1] & 2; |
820 |
format = buf[2] & 0xf; |
821 |
start_track = buf[6];
|
822 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
823 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
824 |
nb_sectors /= s->cluster_size; |
825 |
switch(format) {
|
826 |
case 0: |
827 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
828 |
break;
|
829 |
case 1: |
830 |
/* multi session : only a single session defined */
|
831 |
toclen = 12;
|
832 |
memset(outbuf, 0, 12); |
833 |
outbuf[1] = 0x0a; |
834 |
outbuf[2] = 0x01; |
835 |
outbuf[3] = 0x01; |
836 |
break;
|
837 |
case 2: |
838 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
839 |
break;
|
840 |
default:
|
841 |
goto error_cmd;
|
842 |
} |
843 |
if (toclen > 0) { |
844 |
if (len > toclen)
|
845 |
len = toclen; |
846 |
r->iov.iov_len = len; |
847 |
break;
|
848 |
} |
849 |
error_cmd:
|
850 |
DPRINTF("Read TOC error\n");
|
851 |
goto fail;
|
852 |
} |
853 |
case 0x46: |
854 |
DPRINTF("Get Configuration (rt %d, maxlen %d)\n", buf[1] & 3, len); |
855 |
memset(outbuf, 0, 8); |
856 |
/* ??? This should probably return much more information. For now
|
857 |
just return the basic header indicating the CD-ROM profile. */
|
858 |
outbuf[7] = 8; // CD-ROM |
859 |
r->iov.iov_len = 8;
|
860 |
break;
|
861 |
case 0x56: |
862 |
DPRINTF("Reserve(10)\n");
|
863 |
if (buf[1] & 3) |
864 |
goto fail;
|
865 |
break;
|
866 |
case 0x57: |
867 |
DPRINTF("Release(10)\n");
|
868 |
if (buf[1] & 3) |
869 |
goto fail;
|
870 |
break;
|
871 |
case 0x9e: |
872 |
/* Service Action In subcommands. */
|
873 |
if ((buf[1] & 31) == 0x10) { |
874 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
875 |
memset(outbuf, 0, len);
|
876 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
877 |
nb_sectors /= s->cluster_size; |
878 |
/* Returned value is the address of the last sector. */
|
879 |
if (nb_sectors) {
|
880 |
nb_sectors--; |
881 |
/* Remember the new size for read/write sanity checking. */
|
882 |
s->max_lba = nb_sectors; |
883 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
884 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
885 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
886 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
887 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
888 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
889 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
890 |
outbuf[7] = nb_sectors & 0xff; |
891 |
outbuf[8] = 0; |
892 |
outbuf[9] = 0; |
893 |
outbuf[10] = s->cluster_size * 2; |
894 |
outbuf[11] = 0; |
895 |
/* Protection, exponent and lowest lba field left blank. */
|
896 |
r->iov.iov_len = len; |
897 |
} else {
|
898 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NOT_READY); |
899 |
return 0; |
900 |
} |
901 |
break;
|
902 |
} |
903 |
DPRINTF("Unsupported Service Action In\n");
|
904 |
goto fail;
|
905 |
case 0xa0: |
906 |
DPRINTF("Report LUNs (len %d)\n", len);
|
907 |
if (len < 16) |
908 |
goto fail;
|
909 |
memset(outbuf, 0, 16); |
910 |
outbuf[3] = 8; |
911 |
r->iov.iov_len = 16;
|
912 |
break;
|
913 |
case 0x2f: |
914 |
DPRINTF("Verify (sector %" PRId64 ", count %d)\n", lba, len); |
915 |
break;
|
916 |
default:
|
917 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
918 |
fail:
|
919 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_ILLEGAL_REQUEST); |
920 |
return 0; |
921 |
illegal_lba:
|
922 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR); |
923 |
return 0; |
924 |
} |
925 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
926 |
scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE); |
927 |
} |
928 |
len = r->sector_count * 512 + r->iov.iov_len;
|
929 |
if (is_write) {
|
930 |
return -len;
|
931 |
} else {
|
932 |
if (!r->sector_count)
|
933 |
r->sector_count = -1;
|
934 |
return len;
|
935 |
} |
936 |
} |
937 |
|
938 |
static void scsi_destroy(SCSIDevice *d) |
939 |
{ |
940 |
qemu_free(d->state); |
941 |
qemu_free(d); |
942 |
} |
943 |
|
944 |
SCSIDevice *scsi_disk_init(BlockDriverState *bdrv, int tcq,
|
945 |
scsi_completionfn completion, void *opaque)
|
946 |
{ |
947 |
SCSIDevice *d; |
948 |
SCSIDeviceState *s; |
949 |
uint64_t nb_sectors; |
950 |
|
951 |
s = (SCSIDeviceState *)qemu_mallocz(sizeof(SCSIDeviceState));
|
952 |
s->bdrv = bdrv; |
953 |
s->tcq = tcq; |
954 |
s->completion = completion; |
955 |
s->opaque = opaque; |
956 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
957 |
s->cluster_size = 4;
|
958 |
} else {
|
959 |
s->cluster_size = 1;
|
960 |
} |
961 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
962 |
nb_sectors /= s->cluster_size; |
963 |
if (nb_sectors)
|
964 |
nb_sectors--; |
965 |
s->max_lba = nb_sectors; |
966 |
strncpy(s->drive_serial_str, drive_get_serial(s->bdrv), |
967 |
sizeof(s->drive_serial_str));
|
968 |
if (strlen(s->drive_serial_str) == 0) |
969 |
pstrcpy(s->drive_serial_str, sizeof(s->drive_serial_str), "0"); |
970 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
971 |
d = (SCSIDevice *)qemu_mallocz(sizeof(SCSIDevice));
|
972 |
d->state = s; |
973 |
d->destroy = scsi_destroy; |
974 |
d->send_command = scsi_send_command; |
975 |
d->read_data = scsi_read_data; |
976 |
d->write_data = scsi_write_data; |
977 |
d->cancel_io = scsi_cancel_io; |
978 |
d->get_buf = scsi_get_buf; |
979 |
|
980 |
return d;
|
981 |
} |