root / hw / scsi-disk.c @ ef845c3b
History | View | Annotate | Download (32.6 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 SCSIDiskState SCSIDiskState; |
48 |
|
49 |
typedef struct SCSIRequest { |
50 |
SCSIBus *bus; |
51 |
SCSIDiskState *dev; |
52 |
uint32_t tag; |
53 |
/* ??? We should probably keep track of whether the data transfer is
|
54 |
a read or a write. Currently we rely on the host getting it right. */
|
55 |
/* Both sector and sector_count are in terms of qemu 512 byte blocks. */
|
56 |
uint64_t sector; |
57 |
uint32_t sector_count; |
58 |
struct iovec iov;
|
59 |
QEMUIOVector qiov; |
60 |
BlockDriverAIOCB *aiocb; |
61 |
struct SCSIRequest *next;
|
62 |
uint32_t status; |
63 |
} SCSIRequest; |
64 |
|
65 |
struct SCSIDiskState
|
66 |
{ |
67 |
SCSIDevice qdev; |
68 |
DriveInfo *dinfo; |
69 |
SCSIRequest *requests; |
70 |
/* The qemu block layer uses a fixed 512 byte sector size.
|
71 |
This is the number of 512 byte blocks in a single scsi sector. */
|
72 |
int cluster_size;
|
73 |
uint64_t max_lba; |
74 |
int sense;
|
75 |
char drive_serial_str[21]; |
76 |
QEMUBH *bh; |
77 |
}; |
78 |
|
79 |
/* Global pool of SCSIRequest structures. */
|
80 |
static SCSIRequest *free_requests = NULL; |
81 |
|
82 |
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag)
|
83 |
{ |
84 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
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->bus = scsi_bus_from_device(d); |
95 |
r->dev = s; |
96 |
r->tag = tag; |
97 |
r->sector_count = 0;
|
98 |
r->iov.iov_len = 0;
|
99 |
r->aiocb = NULL;
|
100 |
r->status = 0;
|
101 |
|
102 |
r->next = s->requests; |
103 |
s->requests = r; |
104 |
return r;
|
105 |
} |
106 |
|
107 |
static void scsi_remove_request(SCSIRequest *r) |
108 |
{ |
109 |
SCSIRequest *last; |
110 |
SCSIDiskState *s = r->dev; |
111 |
|
112 |
if (s->requests == r) {
|
113 |
s->requests = r->next; |
114 |
} else {
|
115 |
last = s->requests; |
116 |
while (last && last->next != r)
|
117 |
last = last->next; |
118 |
if (last) {
|
119 |
last->next = r->next; |
120 |
} else {
|
121 |
BADF("Orphaned request\n");
|
122 |
} |
123 |
} |
124 |
r->next = free_requests; |
125 |
free_requests = r; |
126 |
} |
127 |
|
128 |
static SCSIRequest *scsi_find_request(SCSIDiskState *s, uint32_t tag)
|
129 |
{ |
130 |
SCSIRequest *r; |
131 |
|
132 |
r = s->requests; |
133 |
while (r && r->tag != tag)
|
134 |
r = r->next; |
135 |
|
136 |
return r;
|
137 |
} |
138 |
|
139 |
/* Helper function for command completion. */
|
140 |
static void scsi_command_complete(SCSIRequest *r, int status, int sense) |
141 |
{ |
142 |
SCSIDiskState *s = r->dev; |
143 |
uint32_t tag; |
144 |
DPRINTF("Command complete tag=0x%x status=%d sense=%d\n", r->tag, status, sense);
|
145 |
s->sense = sense; |
146 |
tag = r->tag; |
147 |
scsi_remove_request(r); |
148 |
r->bus->complete(r->bus, SCSI_REASON_DONE, tag, status); |
149 |
} |
150 |
|
151 |
/* Cancel a pending data transfer. */
|
152 |
static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) |
153 |
{ |
154 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
155 |
SCSIRequest *r; |
156 |
DPRINTF("Cancel tag=0x%x\n", tag);
|
157 |
r = scsi_find_request(s, tag); |
158 |
if (r) {
|
159 |
if (r->aiocb)
|
160 |
bdrv_aio_cancel(r->aiocb); |
161 |
r->aiocb = NULL;
|
162 |
scsi_remove_request(r); |
163 |
} |
164 |
} |
165 |
|
166 |
static void scsi_read_complete(void * opaque, int ret) |
167 |
{ |
168 |
SCSIRequest *r = (SCSIRequest *)opaque; |
169 |
|
170 |
if (ret) {
|
171 |
DPRINTF("IO error\n");
|
172 |
r->bus->complete(r->bus, 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 |
r->bus->complete(r->bus, 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 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
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 |
r->bus->complete(r->bus, 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->dinfo->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->dinfo->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 |
uint32_t len; |
244 |
uint32_t n; |
245 |
|
246 |
r->aiocb = NULL;
|
247 |
|
248 |
if (ret) {
|
249 |
if (scsi_handle_write_error(r, -ret))
|
250 |
return;
|
251 |
} |
252 |
|
253 |
n = r->iov.iov_len / 512;
|
254 |
r->sector += n; |
255 |
r->sector_count -= n; |
256 |
if (r->sector_count == 0) { |
257 |
scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE); |
258 |
} else {
|
259 |
len = r->sector_count * 512;
|
260 |
if (len > SCSI_DMA_BUF_SIZE) {
|
261 |
len = SCSI_DMA_BUF_SIZE; |
262 |
} |
263 |
r->iov.iov_len = len; |
264 |
DPRINTF("Write complete tag=0x%x more=%d\n", r->tag, len);
|
265 |
r->bus->complete(r->bus, SCSI_REASON_DATA, r->tag, len); |
266 |
} |
267 |
} |
268 |
|
269 |
static void scsi_write_request(SCSIRequest *r) |
270 |
{ |
271 |
SCSIDiskState *s = r->dev; |
272 |
uint32_t n; |
273 |
|
274 |
n = r->iov.iov_len / 512;
|
275 |
if (n) {
|
276 |
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
|
277 |
r->aiocb = bdrv_aio_writev(s->dinfo->bdrv, r->sector, &r->qiov, n, |
278 |
scsi_write_complete, r); |
279 |
if (r->aiocb == NULL) |
280 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, |
281 |
SENSE_HARDWARE_ERROR); |
282 |
} else {
|
283 |
/* Invoke completion routine to fetch data from host. */
|
284 |
scsi_write_complete(r, 0);
|
285 |
} |
286 |
} |
287 |
|
288 |
/* Write data to a scsi device. Returns nonzero on failure.
|
289 |
The transfer may complete asynchronously. */
|
290 |
static int scsi_write_data(SCSIDevice *d, uint32_t tag) |
291 |
{ |
292 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
293 |
SCSIRequest *r; |
294 |
|
295 |
DPRINTF("Write data tag=0x%x\n", tag);
|
296 |
r = scsi_find_request(s, tag); |
297 |
if (!r) {
|
298 |
BADF("Bad write tag 0x%x\n", tag);
|
299 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR); |
300 |
return 1; |
301 |
} |
302 |
|
303 |
if (r->aiocb)
|
304 |
BADF("Data transfer already in progress\n");
|
305 |
|
306 |
scsi_write_request(r); |
307 |
|
308 |
return 0; |
309 |
} |
310 |
|
311 |
static void scsi_dma_restart_bh(void *opaque) |
312 |
{ |
313 |
SCSIDiskState *s = opaque; |
314 |
SCSIRequest *r = s->requests; |
315 |
|
316 |
qemu_bh_delete(s->bh); |
317 |
s->bh = NULL;
|
318 |
|
319 |
while (r) {
|
320 |
if (r->status & SCSI_REQ_STATUS_RETRY) {
|
321 |
r->status &= ~SCSI_REQ_STATUS_RETRY; |
322 |
scsi_write_request(r); |
323 |
} |
324 |
r = r->next; |
325 |
} |
326 |
} |
327 |
|
328 |
static void scsi_dma_restart_cb(void *opaque, int running, int reason) |
329 |
{ |
330 |
SCSIDiskState *s = opaque; |
331 |
|
332 |
if (!running)
|
333 |
return;
|
334 |
|
335 |
if (!s->bh) {
|
336 |
s->bh = qemu_bh_new(scsi_dma_restart_bh, s); |
337 |
qemu_bh_schedule(s->bh); |
338 |
} |
339 |
} |
340 |
|
341 |
/* Return a pointer to the data buffer. */
|
342 |
static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
|
343 |
{ |
344 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
345 |
SCSIRequest *r; |
346 |
|
347 |
r = scsi_find_request(s, tag); |
348 |
if (!r) {
|
349 |
BADF("Bad buffer tag 0x%x\n", tag);
|
350 |
return NULL; |
351 |
} |
352 |
return (uint8_t *)r->iov.iov_base;
|
353 |
} |
354 |
|
355 |
/* Execute a scsi command. Returns the length of the data expected by the
|
356 |
command. This will be Positive for data transfers from the device
|
357 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
358 |
and zero if the command does not transfer any data. */
|
359 |
|
360 |
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
|
361 |
uint8_t *buf, int lun)
|
362 |
{ |
363 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
364 |
uint64_t nb_sectors; |
365 |
uint64_t lba; |
366 |
uint32_t len; |
367 |
int cmdlen;
|
368 |
int is_write;
|
369 |
uint8_t command; |
370 |
uint8_t *outbuf; |
371 |
SCSIRequest *r; |
372 |
|
373 |
command = buf[0];
|
374 |
r = scsi_find_request(s, tag); |
375 |
if (r) {
|
376 |
BADF("Tag 0x%x already in use\n", tag);
|
377 |
scsi_cancel_io(d, tag); |
378 |
} |
379 |
/* ??? Tags are not unique for different luns. We only implement a
|
380 |
single lun, so this should not matter. */
|
381 |
r = scsi_new_request(d, tag); |
382 |
outbuf = (uint8_t *)r->iov.iov_base; |
383 |
is_write = 0;
|
384 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
385 |
switch (command >> 5) { |
386 |
case 0: |
387 |
lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) | |
388 |
(((uint64_t) buf[1] & 0x1f) << 16); |
389 |
len = buf[4];
|
390 |
cmdlen = 6;
|
391 |
break;
|
392 |
case 1: |
393 |
case 2: |
394 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
395 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
396 |
len = buf[8] | (buf[7] << 8); |
397 |
cmdlen = 10;
|
398 |
break;
|
399 |
case 4: |
400 |
lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) | |
401 |
((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) | |
402 |
((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) | |
403 |
((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56); |
404 |
len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24); |
405 |
cmdlen = 16;
|
406 |
break;
|
407 |
case 5: |
408 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
409 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
410 |
len = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24); |
411 |
cmdlen = 12;
|
412 |
break;
|
413 |
default:
|
414 |
BADF("Unsupported command length, command %x\n", command);
|
415 |
goto fail;
|
416 |
} |
417 |
#ifdef DEBUG_SCSI
|
418 |
{ |
419 |
int i;
|
420 |
for (i = 1; i < cmdlen; i++) { |
421 |
printf(" 0x%02x", buf[i]);
|
422 |
} |
423 |
printf("\n");
|
424 |
} |
425 |
#endif
|
426 |
if (lun || buf[1] >> 5) { |
427 |
/* Only LUN 0 supported. */
|
428 |
DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5); |
429 |
if (command != 0x03 && command != 0x12) /* REQUEST SENSE and INQUIRY */ |
430 |
goto fail;
|
431 |
} |
432 |
switch (command) {
|
433 |
case 0x0: |
434 |
DPRINTF("Test Unit Ready\n");
|
435 |
if (!bdrv_is_inserted(s->dinfo->bdrv))
|
436 |
goto notready;
|
437 |
break;
|
438 |
case 0x03: |
439 |
DPRINTF("Request Sense (len %d)\n", len);
|
440 |
if (len < 4) |
441 |
goto fail;
|
442 |
memset(outbuf, 0, 4); |
443 |
r->iov.iov_len = 4;
|
444 |
if (s->sense == SENSE_NOT_READY && len >= 18) { |
445 |
memset(outbuf, 0, 18); |
446 |
r->iov.iov_len = 18;
|
447 |
outbuf[7] = 10; |
448 |
/* asc 0x3a, ascq 0: Medium not present */
|
449 |
outbuf[12] = 0x3a; |
450 |
outbuf[13] = 0; |
451 |
} |
452 |
outbuf[0] = 0xf0; |
453 |
outbuf[1] = 0; |
454 |
outbuf[2] = s->sense;
|
455 |
break;
|
456 |
case 0x12: |
457 |
DPRINTF("Inquiry (len %d)\n", len);
|
458 |
if (buf[1] & 0x2) { |
459 |
/* Command support data - optional, not implemented */
|
460 |
BADF("optional INQUIRY command support request not implemented\n");
|
461 |
goto fail;
|
462 |
} |
463 |
else if (buf[1] & 0x1) { |
464 |
/* Vital product data */
|
465 |
uint8_t page_code = buf[2];
|
466 |
if (len < 4) { |
467 |
BADF("Error: Inquiry (EVPD[%02X]) buffer size %d is "
|
468 |
"less than 4\n", page_code, len);
|
469 |
goto fail;
|
470 |
} |
471 |
|
472 |
switch (page_code) {
|
473 |
case 0x00: |
474 |
{ |
475 |
/* Supported page codes, mandatory */
|
476 |
DPRINTF("Inquiry EVPD[Supported pages] "
|
477 |
"buffer size %d\n", len);
|
478 |
|
479 |
r->iov.iov_len = 0;
|
480 |
|
481 |
if (bdrv_get_type_hint(s->dinfo->bdrv) == BDRV_TYPE_CDROM) {
|
482 |
outbuf[r->iov.iov_len++] = 5;
|
483 |
} else {
|
484 |
outbuf[r->iov.iov_len++] = 0;
|
485 |
} |
486 |
|
487 |
outbuf[r->iov.iov_len++] = 0x00; // this page |
488 |
outbuf[r->iov.iov_len++] = 0x00;
|
489 |
outbuf[r->iov.iov_len++] = 3; // number of pages |
490 |
outbuf[r->iov.iov_len++] = 0x00; // list of supported pages (this page) |
491 |
outbuf[r->iov.iov_len++] = 0x80; // unit serial number |
492 |
outbuf[r->iov.iov_len++] = 0x83; // device identification |
493 |
} |
494 |
break;
|
495 |
case 0x80: |
496 |
{ |
497 |
int l;
|
498 |
|
499 |
/* Device serial number, optional */
|
500 |
if (len < 4) { |
501 |
BADF("Error: EVPD[Serial number] Inquiry buffer "
|
502 |
"size %d too small, %d needed\n", len, 4); |
503 |
goto fail;
|
504 |
} |
505 |
|
506 |
DPRINTF("Inquiry EVPD[Serial number] buffer size %d\n", len);
|
507 |
l = MIN(len, strlen(s->drive_serial_str)); |
508 |
|
509 |
r->iov.iov_len = 0;
|
510 |
|
511 |
/* Supported page codes */
|
512 |
if (bdrv_get_type_hint(s->dinfo->bdrv) == BDRV_TYPE_CDROM) {
|
513 |
outbuf[r->iov.iov_len++] = 5;
|
514 |
} else {
|
515 |
outbuf[r->iov.iov_len++] = 0;
|
516 |
} |
517 |
|
518 |
outbuf[r->iov.iov_len++] = 0x80; // this page |
519 |
outbuf[r->iov.iov_len++] = 0x00;
|
520 |
outbuf[r->iov.iov_len++] = l; |
521 |
memcpy(&outbuf[r->iov.iov_len], s->drive_serial_str, l); |
522 |
r->iov.iov_len += l; |
523 |
} |
524 |
|
525 |
break;
|
526 |
case 0x83: |
527 |
{ |
528 |
/* Device identification page, mandatory */
|
529 |
int max_len = 255 - 8; |
530 |
int id_len = strlen(bdrv_get_device_name(s->dinfo->bdrv));
|
531 |
if (id_len > max_len)
|
532 |
id_len = max_len; |
533 |
|
534 |
DPRINTF("Inquiry EVPD[Device identification] "
|
535 |
"buffer size %d\n", len);
|
536 |
r->iov.iov_len = 0;
|
537 |
if (bdrv_get_type_hint(s->dinfo->bdrv) == BDRV_TYPE_CDROM) {
|
538 |
outbuf[r->iov.iov_len++] = 5;
|
539 |
} else {
|
540 |
outbuf[r->iov.iov_len++] = 0;
|
541 |
} |
542 |
|
543 |
outbuf[r->iov.iov_len++] = 0x83; // this page |
544 |
outbuf[r->iov.iov_len++] = 0x00;
|
545 |
outbuf[r->iov.iov_len++] = 3 + id_len;
|
546 |
|
547 |
outbuf[r->iov.iov_len++] = 0x2; // ASCII |
548 |
outbuf[r->iov.iov_len++] = 0; // not officially assigned |
549 |
outbuf[r->iov.iov_len++] = 0; // reserved |
550 |
outbuf[r->iov.iov_len++] = id_len; // length of data following
|
551 |
|
552 |
memcpy(&outbuf[r->iov.iov_len], |
553 |
bdrv_get_device_name(s->dinfo->bdrv), id_len); |
554 |
r->iov.iov_len += id_len; |
555 |
} |
556 |
break;
|
557 |
default:
|
558 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
559 |
"buffer size %d\n", page_code, len);
|
560 |
goto fail;
|
561 |
} |
562 |
/* done with EVPD */
|
563 |
break;
|
564 |
} |
565 |
else {
|
566 |
/* Standard INQUIRY data */
|
567 |
if (buf[2] != 0) { |
568 |
BADF("Error: Inquiry (STANDARD) page or code "
|
569 |
"is non-zero [%02X]\n", buf[2]); |
570 |
goto fail;
|
571 |
} |
572 |
|
573 |
/* PAGE CODE == 0 */
|
574 |
if (len < 5) { |
575 |
BADF("Error: Inquiry (STANDARD) buffer size %d "
|
576 |
"is less than 5\n", len);
|
577 |
goto fail;
|
578 |
} |
579 |
|
580 |
if (len < 36) { |
581 |
BADF("Error: Inquiry (STANDARD) buffer size %d "
|
582 |
"is less than 36 (TODO: only 5 required)\n", len);
|
583 |
} |
584 |
} |
585 |
|
586 |
if(len > SCSI_MAX_INQUIRY_LEN)
|
587 |
len = SCSI_MAX_INQUIRY_LEN; |
588 |
|
589 |
memset(outbuf, 0, len);
|
590 |
|
591 |
if (lun || buf[1] >> 5) { |
592 |
outbuf[0] = 0x7f; /* LUN not supported */ |
593 |
} else if (bdrv_get_type_hint(s->dinfo->bdrv) == BDRV_TYPE_CDROM) { |
594 |
outbuf[0] = 5; |
595 |
outbuf[1] = 0x80; |
596 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
597 |
} else {
|
598 |
outbuf[0] = 0; |
599 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
600 |
} |
601 |
memcpy(&outbuf[8], "QEMU ", 8); |
602 |
memcpy(&outbuf[32], QEMU_VERSION, 4); |
603 |
/* Identify device as SCSI-3 rev 1.
|
604 |
Some later commands are also implemented. */
|
605 |
outbuf[2] = 3; |
606 |
outbuf[3] = 2; /* Format 2 */ |
607 |
outbuf[4] = len - 5; /* Additional Length = (Len - 1) - 4 */ |
608 |
/* Sync data transfer and TCQ. */
|
609 |
outbuf[7] = 0x10 | (r->bus->tcq ? 0x02 : 0); |
610 |
r->iov.iov_len = len; |
611 |
break;
|
612 |
case 0x16: |
613 |
DPRINTF("Reserve(6)\n");
|
614 |
if (buf[1] & 1) |
615 |
goto fail;
|
616 |
break;
|
617 |
case 0x17: |
618 |
DPRINTF("Release(6)\n");
|
619 |
if (buf[1] & 1) |
620 |
goto fail;
|
621 |
break;
|
622 |
case 0x1a: |
623 |
case 0x5a: |
624 |
{ |
625 |
uint8_t *p; |
626 |
int page;
|
627 |
int dbd;
|
628 |
|
629 |
dbd = buf[1] & 0x8; |
630 |
page = buf[2] & 0x3f; |
631 |
DPRINTF("Mode Sense (page %d, len %d)\n", page, len);
|
632 |
p = outbuf; |
633 |
memset(p, 0, 4); |
634 |
outbuf[1] = 0; /* Default media type. */ |
635 |
outbuf[3] = 0; /* Block descriptor length. */ |
636 |
if (bdrv_get_type_hint(s->dinfo->bdrv) == BDRV_TYPE_CDROM) {
|
637 |
outbuf[2] = 0x80; /* Readonly. */ |
638 |
} |
639 |
p += 4;
|
640 |
bdrv_get_geometry(s->dinfo->bdrv, &nb_sectors); |
641 |
if ((~dbd) & nb_sectors) {
|
642 |
nb_sectors /= s->cluster_size; |
643 |
nb_sectors--; |
644 |
if (nb_sectors > 0xffffff) |
645 |
nb_sectors = 0xffffff;
|
646 |
outbuf[3] = 8; /* Block descriptor length */ |
647 |
p[0] = 0; /* media density code */ |
648 |
p[1] = (nb_sectors >> 16) & 0xff; |
649 |
p[2] = (nb_sectors >> 8) & 0xff; |
650 |
p[3] = nb_sectors & 0xff; |
651 |
p[4] = 0; /* reserved */ |
652 |
p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
653 |
p[6] = s->cluster_size * 2; |
654 |
p[7] = 0; |
655 |
p += 8;
|
656 |
} |
657 |
|
658 |
if (page == 4) { |
659 |
int cylinders, heads, secs;
|
660 |
|
661 |
/* Rigid disk device geometry page. */
|
662 |
p[0] = 4; |
663 |
p[1] = 0x16; |
664 |
/* if a geometry hint is available, use it */
|
665 |
bdrv_get_geometry_hint(s->dinfo->bdrv, &cylinders, &heads, &secs); |
666 |
p[2] = (cylinders >> 16) & 0xff; |
667 |
p[3] = (cylinders >> 8) & 0xff; |
668 |
p[4] = cylinders & 0xff; |
669 |
p[5] = heads & 0xff; |
670 |
/* Write precomp start cylinder, disabled */
|
671 |
p[6] = (cylinders >> 16) & 0xff; |
672 |
p[7] = (cylinders >> 8) & 0xff; |
673 |
p[8] = cylinders & 0xff; |
674 |
/* Reduced current start cylinder, disabled */
|
675 |
p[9] = (cylinders >> 16) & 0xff; |
676 |
p[10] = (cylinders >> 8) & 0xff; |
677 |
p[11] = cylinders & 0xff; |
678 |
/* Device step rate [ns], 200ns */
|
679 |
p[12] = 0; |
680 |
p[13] = 200; |
681 |
/* Landing zone cylinder */
|
682 |
p[14] = 0xff; |
683 |
p[15] = 0xff; |
684 |
p[16] = 0xff; |
685 |
/* Medium rotation rate [rpm], 5400 rpm */
|
686 |
p[20] = (5400 >> 8) & 0xff; |
687 |
p[21] = 5400 & 0xff; |
688 |
p += 0x16;
|
689 |
} else if (page == 5) { |
690 |
int cylinders, heads, secs;
|
691 |
|
692 |
/* Flexible disk device geometry page. */
|
693 |
p[0] = 5; |
694 |
p[1] = 0x1e; |
695 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
696 |
p[2] = 5000 >> 8; |
697 |
p[3] = 5000 & 0xff; |
698 |
/* if a geometry hint is available, use it */
|
699 |
bdrv_get_geometry_hint(s->dinfo->bdrv, &cylinders, &heads, &secs); |
700 |
p[4] = heads & 0xff; |
701 |
p[5] = secs & 0xff; |
702 |
p[6] = s->cluster_size * 2; |
703 |
p[8] = (cylinders >> 8) & 0xff; |
704 |
p[9] = cylinders & 0xff; |
705 |
/* Write precomp start cylinder, disabled */
|
706 |
p[10] = (cylinders >> 8) & 0xff; |
707 |
p[11] = cylinders & 0xff; |
708 |
/* Reduced current start cylinder, disabled */
|
709 |
p[12] = (cylinders >> 8) & 0xff; |
710 |
p[13] = cylinders & 0xff; |
711 |
/* Device step rate [100us], 100us */
|
712 |
p[14] = 0; |
713 |
p[15] = 1; |
714 |
/* Device step pulse width [us], 1us */
|
715 |
p[16] = 1; |
716 |
/* Device head settle delay [100us], 100us */
|
717 |
p[17] = 0; |
718 |
p[18] = 1; |
719 |
/* Motor on delay [0.1s], 0.1s */
|
720 |
p[19] = 1; |
721 |
/* Motor off delay [0.1s], 0.1s */
|
722 |
p[20] = 1; |
723 |
/* Medium rotation rate [rpm], 5400 rpm */
|
724 |
p[28] = (5400 >> 8) & 0xff; |
725 |
p[29] = 5400 & 0xff; |
726 |
p += 0x1e;
|
727 |
} else if ((page == 8 || page == 0x3f)) { |
728 |
/* Caching page. */
|
729 |
memset(p,0,20); |
730 |
p[0] = 8; |
731 |
p[1] = 0x12; |
732 |
if (bdrv_enable_write_cache(s->dinfo->bdrv)) {
|
733 |
p[2] = 4; /* WCE */ |
734 |
} |
735 |
p += 20;
|
736 |
} |
737 |
if ((page == 0x3f || page == 0x2a) |
738 |
&& (bdrv_get_type_hint(s->dinfo->bdrv) == BDRV_TYPE_CDROM)) { |
739 |
/* CD Capabilities and Mechanical Status page. */
|
740 |
p[0] = 0x2a; |
741 |
p[1] = 0x14; |
742 |
p[2] = 3; // CD-R & CD-RW read |
743 |
p[3] = 0; // Writing not supported |
744 |
p[4] = 0x7f; /* Audio, composite, digital out, |
745 |
mode 2 form 1&2, multi session */
|
746 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
747 |
RW corrected, C2 errors, ISRC,
|
748 |
UPC, Bar code */
|
749 |
p[6] = 0x2d | (bdrv_is_locked(s->dinfo->bdrv)? 2 : 0); |
750 |
/* Locking supported, jumper present, eject, tray */
|
751 |
p[7] = 0; /* no volume & mute control, no |
752 |
changer */
|
753 |
p[8] = (50 * 176) >> 8; // 50x read speed |
754 |
p[9] = (50 * 176) & 0xff; |
755 |
p[10] = 0 >> 8; // No volume |
756 |
p[11] = 0 & 0xff; |
757 |
p[12] = 2048 >> 8; // 2M buffer |
758 |
p[13] = 2048 & 0xff; |
759 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
760 |
p[15] = (16 * 176) & 0xff; |
761 |
p[18] = (16 * 176) >> 8; // 16x write speed |
762 |
p[19] = (16 * 176) & 0xff; |
763 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
764 |
p[21] = (16 * 176) & 0xff; |
765 |
p += 22;
|
766 |
} |
767 |
r->iov.iov_len = p - outbuf; |
768 |
outbuf[0] = r->iov.iov_len - 4; |
769 |
if (r->iov.iov_len > len)
|
770 |
r->iov.iov_len = len; |
771 |
} |
772 |
break;
|
773 |
case 0x1b: |
774 |
DPRINTF("Start Stop Unit\n");
|
775 |
if (bdrv_get_type_hint(s->dinfo->bdrv) == BDRV_TYPE_CDROM &&
|
776 |
(buf[4] & 2)) |
777 |
/* load/eject medium */
|
778 |
bdrv_eject(s->dinfo->bdrv, !(buf[4] & 1)); |
779 |
break;
|
780 |
case 0x1e: |
781 |
DPRINTF("Prevent Allow Medium Removal (prevent = %d)\n", buf[4] & 3); |
782 |
bdrv_set_locked(s->dinfo->bdrv, buf[4] & 1); |
783 |
break;
|
784 |
case 0x25: |
785 |
DPRINTF("Read Capacity\n");
|
786 |
/* The normal LEN field for this command is zero. */
|
787 |
memset(outbuf, 0, 8); |
788 |
bdrv_get_geometry(s->dinfo->bdrv, &nb_sectors); |
789 |
nb_sectors /= s->cluster_size; |
790 |
/* Returned value is the address of the last sector. */
|
791 |
if (nb_sectors) {
|
792 |
nb_sectors--; |
793 |
/* Remember the new size for read/write sanity checking. */
|
794 |
s->max_lba = nb_sectors; |
795 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
796 |
if (nb_sectors > UINT32_MAX)
|
797 |
nb_sectors = UINT32_MAX; |
798 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
799 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
800 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
801 |
outbuf[3] = nb_sectors & 0xff; |
802 |
outbuf[4] = 0; |
803 |
outbuf[5] = 0; |
804 |
outbuf[6] = s->cluster_size * 2; |
805 |
outbuf[7] = 0; |
806 |
r->iov.iov_len = 8;
|
807 |
} else {
|
808 |
notready:
|
809 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NOT_READY); |
810 |
return 0; |
811 |
} |
812 |
break;
|
813 |
case 0x08: |
814 |
case 0x28: |
815 |
case 0x88: |
816 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", lba, len); |
817 |
if (lba > s->max_lba)
|
818 |
goto illegal_lba;
|
819 |
r->sector = lba * s->cluster_size; |
820 |
r->sector_count = len * s->cluster_size; |
821 |
break;
|
822 |
case 0x0a: |
823 |
case 0x2a: |
824 |
case 0x8a: |
825 |
DPRINTF("Write (sector %" PRId64 ", count %d)\n", lba, len); |
826 |
if (lba > s->max_lba)
|
827 |
goto illegal_lba;
|
828 |
r->sector = lba * s->cluster_size; |
829 |
r->sector_count = len * s->cluster_size; |
830 |
is_write = 1;
|
831 |
break;
|
832 |
case 0x35: |
833 |
DPRINTF("Synchronise cache (sector %" PRId64 ", count %d)\n", lba, len); |
834 |
bdrv_flush(s->dinfo->bdrv); |
835 |
break;
|
836 |
case 0x43: |
837 |
{ |
838 |
int start_track, format, msf, toclen;
|
839 |
|
840 |
msf = buf[1] & 2; |
841 |
format = buf[2] & 0xf; |
842 |
start_track = buf[6];
|
843 |
bdrv_get_geometry(s->dinfo->bdrv, &nb_sectors); |
844 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
845 |
nb_sectors /= s->cluster_size; |
846 |
switch(format) {
|
847 |
case 0: |
848 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
849 |
break;
|
850 |
case 1: |
851 |
/* multi session : only a single session defined */
|
852 |
toclen = 12;
|
853 |
memset(outbuf, 0, 12); |
854 |
outbuf[1] = 0x0a; |
855 |
outbuf[2] = 0x01; |
856 |
outbuf[3] = 0x01; |
857 |
break;
|
858 |
case 2: |
859 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
860 |
break;
|
861 |
default:
|
862 |
goto error_cmd;
|
863 |
} |
864 |
if (toclen > 0) { |
865 |
if (len > toclen)
|
866 |
len = toclen; |
867 |
r->iov.iov_len = len; |
868 |
break;
|
869 |
} |
870 |
error_cmd:
|
871 |
DPRINTF("Read TOC error\n");
|
872 |
goto fail;
|
873 |
} |
874 |
case 0x46: |
875 |
DPRINTF("Get Configuration (rt %d, maxlen %d)\n", buf[1] & 3, len); |
876 |
memset(outbuf, 0, 8); |
877 |
/* ??? This should probably return much more information. For now
|
878 |
just return the basic header indicating the CD-ROM profile. */
|
879 |
outbuf[7] = 8; // CD-ROM |
880 |
r->iov.iov_len = 8;
|
881 |
break;
|
882 |
case 0x56: |
883 |
DPRINTF("Reserve(10)\n");
|
884 |
if (buf[1] & 3) |
885 |
goto fail;
|
886 |
break;
|
887 |
case 0x57: |
888 |
DPRINTF("Release(10)\n");
|
889 |
if (buf[1] & 3) |
890 |
goto fail;
|
891 |
break;
|
892 |
case 0x9e: |
893 |
/* Service Action In subcommands. */
|
894 |
if ((buf[1] & 31) == 0x10) { |
895 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
896 |
memset(outbuf, 0, len);
|
897 |
bdrv_get_geometry(s->dinfo->bdrv, &nb_sectors); |
898 |
nb_sectors /= s->cluster_size; |
899 |
/* Returned value is the address of the last sector. */
|
900 |
if (nb_sectors) {
|
901 |
nb_sectors--; |
902 |
/* Remember the new size for read/write sanity checking. */
|
903 |
s->max_lba = nb_sectors; |
904 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
905 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
906 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
907 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
908 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
909 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
910 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
911 |
outbuf[7] = nb_sectors & 0xff; |
912 |
outbuf[8] = 0; |
913 |
outbuf[9] = 0; |
914 |
outbuf[10] = s->cluster_size * 2; |
915 |
outbuf[11] = 0; |
916 |
/* Protection, exponent and lowest lba field left blank. */
|
917 |
r->iov.iov_len = len; |
918 |
} else {
|
919 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NOT_READY); |
920 |
return 0; |
921 |
} |
922 |
break;
|
923 |
} |
924 |
DPRINTF("Unsupported Service Action In\n");
|
925 |
goto fail;
|
926 |
case 0xa0: |
927 |
DPRINTF("Report LUNs (len %d)\n", len);
|
928 |
if (len < 16) |
929 |
goto fail;
|
930 |
memset(outbuf, 0, 16); |
931 |
outbuf[3] = 8; |
932 |
r->iov.iov_len = 16;
|
933 |
break;
|
934 |
case 0x2f: |
935 |
DPRINTF("Verify (sector %" PRId64 ", count %d)\n", lba, len); |
936 |
break;
|
937 |
default:
|
938 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
939 |
fail:
|
940 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_ILLEGAL_REQUEST); |
941 |
return 0; |
942 |
illegal_lba:
|
943 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR); |
944 |
return 0; |
945 |
} |
946 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
947 |
scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE); |
948 |
} |
949 |
len = r->sector_count * 512 + r->iov.iov_len;
|
950 |
if (is_write) {
|
951 |
return -len;
|
952 |
} else {
|
953 |
if (!r->sector_count)
|
954 |
r->sector_count = -1;
|
955 |
return len;
|
956 |
} |
957 |
} |
958 |
|
959 |
static void scsi_destroy(SCSIDevice *dev) |
960 |
{ |
961 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
962 |
|
963 |
drive_uninit(s->dinfo); |
964 |
} |
965 |
|
966 |
static int scsi_disk_initfn(SCSIDevice *dev) |
967 |
{ |
968 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
969 |
uint64_t nb_sectors; |
970 |
|
971 |
if (!s->dinfo || !s->dinfo->bdrv) {
|
972 |
qemu_error("scsi-disk: drive property not set\n");
|
973 |
return -1; |
974 |
} |
975 |
|
976 |
if (bdrv_get_type_hint(s->dinfo->bdrv) == BDRV_TYPE_CDROM) {
|
977 |
s->cluster_size = 4;
|
978 |
} else {
|
979 |
s->cluster_size = 1;
|
980 |
} |
981 |
bdrv_get_geometry(s->dinfo->bdrv, &nb_sectors); |
982 |
nb_sectors /= s->cluster_size; |
983 |
if (nb_sectors)
|
984 |
nb_sectors--; |
985 |
s->max_lba = nb_sectors; |
986 |
strncpy(s->drive_serial_str, drive_get_serial(s->dinfo->bdrv), |
987 |
sizeof(s->drive_serial_str));
|
988 |
if (strlen(s->drive_serial_str) == 0) |
989 |
pstrcpy(s->drive_serial_str, sizeof(s->drive_serial_str), "0"); |
990 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
991 |
return 0; |
992 |
} |
993 |
|
994 |
static SCSIDeviceInfo scsi_disk_info = {
|
995 |
.qdev.name = "scsi-disk",
|
996 |
.qdev.desc = "virtual scsi disk or cdrom",
|
997 |
.qdev.size = sizeof(SCSIDiskState),
|
998 |
.init = scsi_disk_initfn, |
999 |
.destroy = scsi_destroy, |
1000 |
.send_command = scsi_send_command, |
1001 |
.read_data = scsi_read_data, |
1002 |
.write_data = scsi_write_data, |
1003 |
.cancel_io = scsi_cancel_io, |
1004 |
.get_buf = scsi_get_buf, |
1005 |
.qdev.props = (Property[]) { |
1006 |
DEFINE_PROP_DRIVE("drive", SCSIDiskState, dinfo),
|
1007 |
DEFINE_PROP_END_OF_LIST(), |
1008 |
}, |
1009 |
}; |
1010 |
|
1011 |
static void scsi_disk_register_devices(void) |
1012 |
{ |
1013 |
scsi_qdev_register(&scsi_disk_info); |
1014 |
} |
1015 |
device_init(scsi_disk_register_devices) |