root / hw / scsi-disk.c @ c5bf71a9
History | View | Annotate | Download (40.4 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 |
* Modifications:
|
9 |
* 2009-Dec-12 Artyom Tarasenko : implemented stamdard inquiry for the case
|
10 |
* when the allocation length of CDB is smaller
|
11 |
* than 36.
|
12 |
* 2009-Oct-13 Artyom Tarasenko : implemented the block descriptor in the
|
13 |
* MODE SENSE response.
|
14 |
*
|
15 |
* This code is licenced under the LGPL.
|
16 |
*
|
17 |
* Note that this file only handles the SCSI architecture model and device
|
18 |
* commands. Emulation of interface/link layer protocols is handled by
|
19 |
* the host adapter emulator.
|
20 |
*/
|
21 |
|
22 |
//#define DEBUG_SCSI
|
23 |
|
24 |
#ifdef DEBUG_SCSI
|
25 |
#define DPRINTF(fmt, ...) \
|
26 |
do { printf("scsi-disk: " fmt , ## __VA_ARGS__); } while (0) |
27 |
#else
|
28 |
#define DPRINTF(fmt, ...) do {} while(0) |
29 |
#endif
|
30 |
|
31 |
#define BADF(fmt, ...) \
|
32 |
do { fprintf(stderr, "scsi-disk: " fmt , ## __VA_ARGS__); } while (0) |
33 |
|
34 |
#include "qemu-common.h" |
35 |
#include "qemu-error.h" |
36 |
#include "scsi.h" |
37 |
#include "scsi-defs.h" |
38 |
#include "sysemu.h" |
39 |
#include "blockdev.h" |
40 |
|
41 |
#define SCSI_DMA_BUF_SIZE 131072 |
42 |
#define SCSI_MAX_INQUIRY_LEN 256 |
43 |
|
44 |
#define SCSI_REQ_STATUS_RETRY 0x01 |
45 |
#define SCSI_REQ_STATUS_RETRY_TYPE_MASK 0x06 |
46 |
#define SCSI_REQ_STATUS_RETRY_READ 0x00 |
47 |
#define SCSI_REQ_STATUS_RETRY_WRITE 0x02 |
48 |
#define SCSI_REQ_STATUS_RETRY_FLUSH 0x04 |
49 |
|
50 |
typedef struct SCSIDiskState SCSIDiskState; |
51 |
|
52 |
typedef struct SCSIDiskReq { |
53 |
SCSIRequest req; |
54 |
/* Both sector and sector_count are in terms of qemu 512 byte blocks. */
|
55 |
uint64_t sector; |
56 |
uint32_t sector_count; |
57 |
struct iovec iov;
|
58 |
QEMUIOVector qiov; |
59 |
uint32_t status; |
60 |
} SCSIDiskReq; |
61 |
|
62 |
typedef enum { SCSI_HD, SCSI_CD } SCSIDriveKind; |
63 |
|
64 |
struct SCSIDiskState
|
65 |
{ |
66 |
SCSIDevice qdev; |
67 |
BlockDriverState *bs; |
68 |
/* The qemu block layer uses a fixed 512 byte sector size.
|
69 |
This is the number of 512 byte blocks in a single scsi sector. */
|
70 |
int cluster_size;
|
71 |
uint32_t removable; |
72 |
uint64_t max_lba; |
73 |
QEMUBH *bh; |
74 |
char *version;
|
75 |
char *serial;
|
76 |
SCSISense sense; |
77 |
SCSIDriveKind drive_kind; |
78 |
}; |
79 |
|
80 |
static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type); |
81 |
static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf); |
82 |
|
83 |
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag,
|
84 |
uint32_t lun, void *hba_private)
|
85 |
{ |
86 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
87 |
SCSIRequest *req; |
88 |
SCSIDiskReq *r; |
89 |
|
90 |
req = scsi_req_alloc(sizeof(SCSIDiskReq), &s->qdev, tag, lun, hba_private);
|
91 |
r = DO_UPCAST(SCSIDiskReq, req, req); |
92 |
r->iov.iov_base = qemu_blockalign(s->bs, SCSI_DMA_BUF_SIZE); |
93 |
return req;
|
94 |
} |
95 |
|
96 |
static void scsi_free_request(SCSIRequest *req) |
97 |
{ |
98 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
99 |
|
100 |
qemu_vfree(r->iov.iov_base); |
101 |
} |
102 |
|
103 |
static void scsi_disk_clear_sense(SCSIDiskState *s) |
104 |
{ |
105 |
memset(&s->sense, 0, sizeof(s->sense)); |
106 |
} |
107 |
|
108 |
static void scsi_req_set_status(SCSIDiskReq *r, int status, SCSISense sense) |
109 |
{ |
110 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
111 |
|
112 |
r->req.status = status; |
113 |
s->sense = sense; |
114 |
} |
115 |
|
116 |
/* Helper function for command completion. */
|
117 |
static void scsi_command_complete(SCSIDiskReq *r, int status, SCSISense sense) |
118 |
{ |
119 |
DPRINTF("Command complete tag=0x%x status=%d sense=%d/%d/%d\n",
|
120 |
r->req.tag, status, sense.key, sense.asc, sense.ascq); |
121 |
scsi_req_set_status(r, status, sense); |
122 |
scsi_req_complete(&r->req); |
123 |
} |
124 |
|
125 |
/* Cancel a pending data transfer. */
|
126 |
static void scsi_cancel_io(SCSIRequest *req) |
127 |
{ |
128 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
129 |
|
130 |
DPRINTF("Cancel tag=0x%x\n", req->tag);
|
131 |
if (r->req.aiocb) {
|
132 |
bdrv_aio_cancel(r->req.aiocb); |
133 |
} |
134 |
r->req.aiocb = NULL;
|
135 |
} |
136 |
|
137 |
static void scsi_read_complete(void * opaque, int ret) |
138 |
{ |
139 |
SCSIDiskReq *r = (SCSIDiskReq *)opaque; |
140 |
int n;
|
141 |
|
142 |
r->req.aiocb = NULL;
|
143 |
|
144 |
if (ret) {
|
145 |
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_READ)) {
|
146 |
return;
|
147 |
} |
148 |
} |
149 |
|
150 |
DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->iov.iov_len);
|
151 |
|
152 |
n = r->iov.iov_len / 512;
|
153 |
r->sector += n; |
154 |
r->sector_count -= n; |
155 |
scsi_req_data(&r->req, r->iov.iov_len); |
156 |
} |
157 |
|
158 |
|
159 |
/* Read more data from scsi device into buffer. */
|
160 |
static void scsi_read_data(SCSIRequest *req) |
161 |
{ |
162 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
163 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
164 |
uint32_t n; |
165 |
|
166 |
if (r->sector_count == (uint32_t)-1) { |
167 |
DPRINTF("Read buf_len=%zd\n", r->iov.iov_len);
|
168 |
r->sector_count = 0;
|
169 |
scsi_req_data(&r->req, r->iov.iov_len); |
170 |
return;
|
171 |
} |
172 |
DPRINTF("Read sector_count=%d\n", r->sector_count);
|
173 |
if (r->sector_count == 0) { |
174 |
scsi_command_complete(r, GOOD, SENSE_CODE(NO_SENSE)); |
175 |
return;
|
176 |
} |
177 |
|
178 |
/* No data transfer may already be in progress */
|
179 |
assert(r->req.aiocb == NULL);
|
180 |
|
181 |
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
182 |
DPRINTF("Data transfer direction invalid\n");
|
183 |
scsi_read_complete(r, -EINVAL); |
184 |
return;
|
185 |
} |
186 |
|
187 |
n = r->sector_count; |
188 |
if (n > SCSI_DMA_BUF_SIZE / 512) |
189 |
n = SCSI_DMA_BUF_SIZE / 512;
|
190 |
|
191 |
r->iov.iov_len = n * 512;
|
192 |
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
|
193 |
r->req.aiocb = bdrv_aio_readv(s->bs, r->sector, &r->qiov, n, |
194 |
scsi_read_complete, r); |
195 |
if (r->req.aiocb == NULL) { |
196 |
scsi_read_complete(r, -EIO); |
197 |
} |
198 |
} |
199 |
|
200 |
static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type) |
201 |
{ |
202 |
int is_read = (type == SCSI_REQ_STATUS_RETRY_READ);
|
203 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
204 |
BlockErrorAction action = bdrv_get_on_error(s->bs, is_read); |
205 |
|
206 |
if (action == BLOCK_ERR_IGNORE) {
|
207 |
bdrv_mon_event(s->bs, BDRV_ACTION_IGNORE, is_read); |
208 |
return 0; |
209 |
} |
210 |
|
211 |
if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC)
|
212 |
|| action == BLOCK_ERR_STOP_ANY) { |
213 |
|
214 |
type &= SCSI_REQ_STATUS_RETRY_TYPE_MASK; |
215 |
r->status |= SCSI_REQ_STATUS_RETRY | type; |
216 |
|
217 |
bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read); |
218 |
vm_stop(VMSTOP_DISKFULL); |
219 |
} else {
|
220 |
if (type == SCSI_REQ_STATUS_RETRY_READ) {
|
221 |
scsi_req_data(&r->req, 0);
|
222 |
} |
223 |
switch (error) {
|
224 |
case ENOMEM:
|
225 |
scsi_command_complete(r, CHECK_CONDITION, |
226 |
SENSE_CODE(TARGET_FAILURE)); |
227 |
break;
|
228 |
case EINVAL:
|
229 |
scsi_command_complete(r, CHECK_CONDITION, |
230 |
SENSE_CODE(INVALID_FIELD)); |
231 |
break;
|
232 |
default:
|
233 |
scsi_command_complete(r, CHECK_CONDITION, |
234 |
SENSE_CODE(IO_ERROR)); |
235 |
break;
|
236 |
} |
237 |
bdrv_mon_event(s->bs, BDRV_ACTION_REPORT, is_read); |
238 |
} |
239 |
return 1; |
240 |
} |
241 |
|
242 |
static void scsi_write_complete(void * opaque, int ret) |
243 |
{ |
244 |
SCSIDiskReq *r = (SCSIDiskReq *)opaque; |
245 |
uint32_t len; |
246 |
uint32_t n; |
247 |
|
248 |
r->req.aiocb = NULL;
|
249 |
|
250 |
if (ret) {
|
251 |
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_WRITE)) {
|
252 |
return;
|
253 |
} |
254 |
} |
255 |
|
256 |
n = r->iov.iov_len / 512;
|
257 |
r->sector += n; |
258 |
r->sector_count -= n; |
259 |
if (r->sector_count == 0) { |
260 |
scsi_command_complete(r, GOOD, SENSE_CODE(NO_SENSE)); |
261 |
} else {
|
262 |
len = r->sector_count * 512;
|
263 |
if (len > SCSI_DMA_BUF_SIZE) {
|
264 |
len = SCSI_DMA_BUF_SIZE; |
265 |
} |
266 |
r->iov.iov_len = len; |
267 |
DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, len);
|
268 |
scsi_req_data(&r->req, len); |
269 |
} |
270 |
} |
271 |
|
272 |
static void scsi_write_data(SCSIRequest *req) |
273 |
{ |
274 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
275 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
276 |
uint32_t n; |
277 |
|
278 |
/* No data transfer may already be in progress */
|
279 |
assert(r->req.aiocb == NULL);
|
280 |
|
281 |
if (r->req.cmd.mode != SCSI_XFER_TO_DEV) {
|
282 |
DPRINTF("Data transfer direction invalid\n");
|
283 |
scsi_write_complete(r, -EINVAL); |
284 |
return;
|
285 |
} |
286 |
|
287 |
n = r->iov.iov_len / 512;
|
288 |
if (n) {
|
289 |
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
|
290 |
r->req.aiocb = bdrv_aio_writev(s->bs, r->sector, &r->qiov, n, |
291 |
scsi_write_complete, r); |
292 |
if (r->req.aiocb == NULL) { |
293 |
scsi_write_complete(r, -ENOMEM); |
294 |
} |
295 |
} else {
|
296 |
/* Invoke completion routine to fetch data from host. */
|
297 |
scsi_write_complete(r, 0);
|
298 |
} |
299 |
} |
300 |
|
301 |
static void scsi_dma_restart_bh(void *opaque) |
302 |
{ |
303 |
SCSIDiskState *s = opaque; |
304 |
SCSIRequest *req; |
305 |
SCSIDiskReq *r; |
306 |
|
307 |
qemu_bh_delete(s->bh); |
308 |
s->bh = NULL;
|
309 |
|
310 |
QTAILQ_FOREACH(req, &s->qdev.requests, next) { |
311 |
r = DO_UPCAST(SCSIDiskReq, req, req); |
312 |
if (r->status & SCSI_REQ_STATUS_RETRY) {
|
313 |
int status = r->status;
|
314 |
int ret;
|
315 |
|
316 |
r->status &= |
317 |
~(SCSI_REQ_STATUS_RETRY | SCSI_REQ_STATUS_RETRY_TYPE_MASK); |
318 |
|
319 |
switch (status & SCSI_REQ_STATUS_RETRY_TYPE_MASK) {
|
320 |
case SCSI_REQ_STATUS_RETRY_READ:
|
321 |
scsi_read_data(&r->req); |
322 |
break;
|
323 |
case SCSI_REQ_STATUS_RETRY_WRITE:
|
324 |
scsi_write_data(&r->req); |
325 |
break;
|
326 |
case SCSI_REQ_STATUS_RETRY_FLUSH:
|
327 |
ret = scsi_disk_emulate_command(r, r->iov.iov_base); |
328 |
if (ret == 0) { |
329 |
scsi_command_complete(r, GOOD, SENSE_CODE(NO_SENSE)); |
330 |
} |
331 |
} |
332 |
} |
333 |
} |
334 |
} |
335 |
|
336 |
static void scsi_dma_restart_cb(void *opaque, int running, int reason) |
337 |
{ |
338 |
SCSIDiskState *s = opaque; |
339 |
|
340 |
if (!running)
|
341 |
return;
|
342 |
|
343 |
if (!s->bh) {
|
344 |
s->bh = qemu_bh_new(scsi_dma_restart_bh, s); |
345 |
qemu_bh_schedule(s->bh); |
346 |
} |
347 |
} |
348 |
|
349 |
/* Return a pointer to the data buffer. */
|
350 |
static uint8_t *scsi_get_buf(SCSIRequest *req)
|
351 |
{ |
352 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
353 |
|
354 |
return (uint8_t *)r->iov.iov_base;
|
355 |
} |
356 |
|
357 |
/* Copy sense information into the provided buffer */
|
358 |
static int scsi_get_sense(SCSIRequest *req, uint8_t *outbuf, int len) |
359 |
{ |
360 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
361 |
|
362 |
return scsi_build_sense(s->sense, outbuf, len, len > 14); |
363 |
} |
364 |
|
365 |
static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) |
366 |
{ |
367 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
368 |
int buflen = 0; |
369 |
|
370 |
if (req->cmd.buf[1] & 0x2) { |
371 |
/* Command support data - optional, not implemented */
|
372 |
BADF("optional INQUIRY command support request not implemented\n");
|
373 |
return -1; |
374 |
} |
375 |
|
376 |
if (req->cmd.buf[1] & 0x1) { |
377 |
/* Vital product data */
|
378 |
uint8_t page_code = req->cmd.buf[2];
|
379 |
if (req->cmd.xfer < 4) { |
380 |
BADF("Error: Inquiry (EVPD[%02X]) buffer size %zd is "
|
381 |
"less than 4\n", page_code, req->cmd.xfer);
|
382 |
return -1; |
383 |
} |
384 |
|
385 |
if (s->drive_kind == SCSI_CD) {
|
386 |
outbuf[buflen++] = 5;
|
387 |
} else {
|
388 |
outbuf[buflen++] = 0;
|
389 |
} |
390 |
outbuf[buflen++] = page_code ; // this page
|
391 |
outbuf[buflen++] = 0x00;
|
392 |
|
393 |
switch (page_code) {
|
394 |
case 0x00: /* Supported page codes, mandatory */ |
395 |
{ |
396 |
int pages;
|
397 |
DPRINTF("Inquiry EVPD[Supported pages] "
|
398 |
"buffer size %zd\n", req->cmd.xfer);
|
399 |
pages = buflen++; |
400 |
outbuf[buflen++] = 0x00; // list of supported pages (this page) |
401 |
outbuf[buflen++] = 0x80; // unit serial number |
402 |
outbuf[buflen++] = 0x83; // device identification |
403 |
if (s->drive_kind == SCSI_HD) {
|
404 |
outbuf[buflen++] = 0xb0; // block limits |
405 |
outbuf[buflen++] = 0xb2; // thin provisioning |
406 |
} |
407 |
outbuf[pages] = buflen - pages - 1; // number of pages |
408 |
break;
|
409 |
} |
410 |
case 0x80: /* Device serial number, optional */ |
411 |
{ |
412 |
int l = strlen(s->serial);
|
413 |
|
414 |
if (l > req->cmd.xfer)
|
415 |
l = req->cmd.xfer; |
416 |
if (l > 20) |
417 |
l = 20;
|
418 |
|
419 |
DPRINTF("Inquiry EVPD[Serial number] "
|
420 |
"buffer size %zd\n", req->cmd.xfer);
|
421 |
outbuf[buflen++] = l; |
422 |
memcpy(outbuf+buflen, s->serial, l); |
423 |
buflen += l; |
424 |
break;
|
425 |
} |
426 |
|
427 |
case 0x83: /* Device identification page, mandatory */ |
428 |
{ |
429 |
int max_len = 255 - 8; |
430 |
int id_len = strlen(bdrv_get_device_name(s->bs));
|
431 |
|
432 |
if (id_len > max_len)
|
433 |
id_len = max_len; |
434 |
DPRINTF("Inquiry EVPD[Device identification] "
|
435 |
"buffer size %zd\n", req->cmd.xfer);
|
436 |
|
437 |
outbuf[buflen++] = 4 + id_len;
|
438 |
outbuf[buflen++] = 0x2; // ASCII |
439 |
outbuf[buflen++] = 0; // not officially assigned |
440 |
outbuf[buflen++] = 0; // reserved |
441 |
outbuf[buflen++] = id_len; // length of data following
|
442 |
|
443 |
memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len); |
444 |
buflen += id_len; |
445 |
break;
|
446 |
} |
447 |
case 0xb0: /* block limits */ |
448 |
{ |
449 |
unsigned int unmap_sectors = |
450 |
s->qdev.conf.discard_granularity / s->qdev.blocksize; |
451 |
unsigned int min_io_size = |
452 |
s->qdev.conf.min_io_size / s->qdev.blocksize; |
453 |
unsigned int opt_io_size = |
454 |
s->qdev.conf.opt_io_size / s->qdev.blocksize; |
455 |
|
456 |
if (s->drive_kind == SCSI_CD) {
|
457 |
DPRINTF("Inquiry (EVPD[%02X] not supported for CDROM\n",
|
458 |
page_code); |
459 |
return -1; |
460 |
} |
461 |
/* required VPD size with unmap support */
|
462 |
outbuf[3] = buflen = 0x3c; |
463 |
|
464 |
memset(outbuf + 4, 0, buflen - 4); |
465 |
|
466 |
/* optimal transfer length granularity */
|
467 |
outbuf[6] = (min_io_size >> 8) & 0xff; |
468 |
outbuf[7] = min_io_size & 0xff; |
469 |
|
470 |
/* optimal transfer length */
|
471 |
outbuf[12] = (opt_io_size >> 24) & 0xff; |
472 |
outbuf[13] = (opt_io_size >> 16) & 0xff; |
473 |
outbuf[14] = (opt_io_size >> 8) & 0xff; |
474 |
outbuf[15] = opt_io_size & 0xff; |
475 |
|
476 |
/* optimal unmap granularity */
|
477 |
outbuf[28] = (unmap_sectors >> 24) & 0xff; |
478 |
outbuf[29] = (unmap_sectors >> 16) & 0xff; |
479 |
outbuf[30] = (unmap_sectors >> 8) & 0xff; |
480 |
outbuf[31] = unmap_sectors & 0xff; |
481 |
break;
|
482 |
} |
483 |
case 0xb2: /* thin provisioning */ |
484 |
{ |
485 |
outbuf[3] = buflen = 8; |
486 |
outbuf[4] = 0; |
487 |
outbuf[5] = 0x40; /* write same with unmap supported */ |
488 |
outbuf[6] = 0; |
489 |
outbuf[7] = 0; |
490 |
break;
|
491 |
} |
492 |
default:
|
493 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
494 |
"buffer size %zd\n", page_code, req->cmd.xfer);
|
495 |
return -1; |
496 |
} |
497 |
/* done with EVPD */
|
498 |
return buflen;
|
499 |
} |
500 |
|
501 |
/* Standard INQUIRY data */
|
502 |
if (req->cmd.buf[2] != 0) { |
503 |
BADF("Error: Inquiry (STANDARD) page or code "
|
504 |
"is non-zero [%02X]\n", req->cmd.buf[2]); |
505 |
return -1; |
506 |
} |
507 |
|
508 |
/* PAGE CODE == 0 */
|
509 |
if (req->cmd.xfer < 5) { |
510 |
BADF("Error: Inquiry (STANDARD) buffer size %zd "
|
511 |
"is less than 5\n", req->cmd.xfer);
|
512 |
return -1; |
513 |
} |
514 |
|
515 |
buflen = req->cmd.xfer; |
516 |
if (buflen > SCSI_MAX_INQUIRY_LEN)
|
517 |
buflen = SCSI_MAX_INQUIRY_LEN; |
518 |
|
519 |
memset(outbuf, 0, buflen);
|
520 |
|
521 |
if (req->lun) {
|
522 |
outbuf[0] = 0x7f; /* LUN not supported */ |
523 |
return buflen;
|
524 |
} |
525 |
|
526 |
if (s->drive_kind == SCSI_CD) {
|
527 |
outbuf[0] = 5; |
528 |
outbuf[1] = 0x80; |
529 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
530 |
} else {
|
531 |
outbuf[0] = 0; |
532 |
outbuf[1] = s->removable ? 0x80 : 0; |
533 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
534 |
} |
535 |
memcpy(&outbuf[8], "QEMU ", 8); |
536 |
memset(&outbuf[32], 0, 4); |
537 |
memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version))); |
538 |
/*
|
539 |
* We claim conformance to SPC-3, which is required for guests
|
540 |
* to ask for modern features like READ CAPACITY(16) or the
|
541 |
* block characteristics VPD page by default. Not all of SPC-3
|
542 |
* is actually implemented, but we're good enough.
|
543 |
*/
|
544 |
outbuf[2] = 5; |
545 |
outbuf[3] = 2; /* Format 2 */ |
546 |
|
547 |
if (buflen > 36) { |
548 |
outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ |
549 |
} else {
|
550 |
/* If the allocation length of CDB is too small,
|
551 |
the additional length is not adjusted */
|
552 |
outbuf[4] = 36 - 5; |
553 |
} |
554 |
|
555 |
/* Sync data transfer and TCQ. */
|
556 |
outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0); |
557 |
return buflen;
|
558 |
} |
559 |
|
560 |
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p, |
561 |
int page_control)
|
562 |
{ |
563 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
564 |
BlockDriverState *bdrv = s->bs; |
565 |
int cylinders, heads, secs;
|
566 |
|
567 |
/*
|
568 |
* If Changeable Values are requested, a mask denoting those mode parameters
|
569 |
* that are changeable shall be returned. As we currently don't support
|
570 |
* parameter changes via MODE_SELECT all bits are returned set to zero.
|
571 |
* The buffer was already menset to zero by the caller of this function.
|
572 |
*/
|
573 |
switch (page) {
|
574 |
case 4: /* Rigid disk device geometry page. */ |
575 |
p[0] = 4; |
576 |
p[1] = 0x16; |
577 |
if (page_control == 1) { /* Changeable Values */ |
578 |
return p[1] + 2; |
579 |
} |
580 |
/* if a geometry hint is available, use it */
|
581 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
582 |
p[2] = (cylinders >> 16) & 0xff; |
583 |
p[3] = (cylinders >> 8) & 0xff; |
584 |
p[4] = cylinders & 0xff; |
585 |
p[5] = heads & 0xff; |
586 |
/* Write precomp start cylinder, disabled */
|
587 |
p[6] = (cylinders >> 16) & 0xff; |
588 |
p[7] = (cylinders >> 8) & 0xff; |
589 |
p[8] = cylinders & 0xff; |
590 |
/* Reduced current start cylinder, disabled */
|
591 |
p[9] = (cylinders >> 16) & 0xff; |
592 |
p[10] = (cylinders >> 8) & 0xff; |
593 |
p[11] = cylinders & 0xff; |
594 |
/* Device step rate [ns], 200ns */
|
595 |
p[12] = 0; |
596 |
p[13] = 200; |
597 |
/* Landing zone cylinder */
|
598 |
p[14] = 0xff; |
599 |
p[15] = 0xff; |
600 |
p[16] = 0xff; |
601 |
/* Medium rotation rate [rpm], 5400 rpm */
|
602 |
p[20] = (5400 >> 8) & 0xff; |
603 |
p[21] = 5400 & 0xff; |
604 |
return p[1] + 2; |
605 |
|
606 |
case 5: /* Flexible disk device geometry page. */ |
607 |
p[0] = 5; |
608 |
p[1] = 0x1e; |
609 |
if (page_control == 1) { /* Changeable Values */ |
610 |
return p[1] + 2; |
611 |
} |
612 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
613 |
p[2] = 5000 >> 8; |
614 |
p[3] = 5000 & 0xff; |
615 |
/* if a geometry hint is available, use it */
|
616 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
617 |
p[4] = heads & 0xff; |
618 |
p[5] = secs & 0xff; |
619 |
p[6] = s->cluster_size * 2; |
620 |
p[8] = (cylinders >> 8) & 0xff; |
621 |
p[9] = cylinders & 0xff; |
622 |
/* Write precomp start cylinder, disabled */
|
623 |
p[10] = (cylinders >> 8) & 0xff; |
624 |
p[11] = cylinders & 0xff; |
625 |
/* Reduced current start cylinder, disabled */
|
626 |
p[12] = (cylinders >> 8) & 0xff; |
627 |
p[13] = cylinders & 0xff; |
628 |
/* Device step rate [100us], 100us */
|
629 |
p[14] = 0; |
630 |
p[15] = 1; |
631 |
/* Device step pulse width [us], 1us */
|
632 |
p[16] = 1; |
633 |
/* Device head settle delay [100us], 100us */
|
634 |
p[17] = 0; |
635 |
p[18] = 1; |
636 |
/* Motor on delay [0.1s], 0.1s */
|
637 |
p[19] = 1; |
638 |
/* Motor off delay [0.1s], 0.1s */
|
639 |
p[20] = 1; |
640 |
/* Medium rotation rate [rpm], 5400 rpm */
|
641 |
p[28] = (5400 >> 8) & 0xff; |
642 |
p[29] = 5400 & 0xff; |
643 |
return p[1] + 2; |
644 |
|
645 |
case 8: /* Caching page. */ |
646 |
p[0] = 8; |
647 |
p[1] = 0x12; |
648 |
if (page_control == 1) { /* Changeable Values */ |
649 |
return p[1] + 2; |
650 |
} |
651 |
if (bdrv_enable_write_cache(s->bs)) {
|
652 |
p[2] = 4; /* WCE */ |
653 |
} |
654 |
return p[1] + 2; |
655 |
|
656 |
case 0x2a: /* CD Capabilities and Mechanical Status page. */ |
657 |
if (s->drive_kind != SCSI_CD)
|
658 |
return 0; |
659 |
p[0] = 0x2a; |
660 |
p[1] = 0x14; |
661 |
if (page_control == 1) { /* Changeable Values */ |
662 |
return p[1] + 2; |
663 |
} |
664 |
p[2] = 3; // CD-R & CD-RW read |
665 |
p[3] = 0; // Writing not supported |
666 |
p[4] = 0x7f; /* Audio, composite, digital out, |
667 |
mode 2 form 1&2, multi session */
|
668 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
669 |
RW corrected, C2 errors, ISRC,
|
670 |
UPC, Bar code */
|
671 |
p[6] = 0x2d | (bdrv_is_locked(s->bs)? 2 : 0); |
672 |
/* Locking supported, jumper present, eject, tray */
|
673 |
p[7] = 0; /* no volume & mute control, no |
674 |
changer */
|
675 |
p[8] = (50 * 176) >> 8; // 50x read speed |
676 |
p[9] = (50 * 176) & 0xff; |
677 |
p[10] = 0 >> 8; // No volume |
678 |
p[11] = 0 & 0xff; |
679 |
p[12] = 2048 >> 8; // 2M buffer |
680 |
p[13] = 2048 & 0xff; |
681 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
682 |
p[15] = (16 * 176) & 0xff; |
683 |
p[18] = (16 * 176) >> 8; // 16x write speed |
684 |
p[19] = (16 * 176) & 0xff; |
685 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
686 |
p[21] = (16 * 176) & 0xff; |
687 |
return p[1] + 2; |
688 |
|
689 |
default:
|
690 |
return 0; |
691 |
} |
692 |
} |
693 |
|
694 |
static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf) |
695 |
{ |
696 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
697 |
uint64_t nb_sectors; |
698 |
int page, dbd, buflen, page_control;
|
699 |
uint8_t *p; |
700 |
uint8_t dev_specific_param; |
701 |
|
702 |
dbd = req->cmd.buf[1] & 0x8; |
703 |
page = req->cmd.buf[2] & 0x3f; |
704 |
page_control = (req->cmd.buf[2] & 0xc0) >> 6; |
705 |
DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n",
|
706 |
(req->cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, req->cmd.xfer, page_control); |
707 |
memset(outbuf, 0, req->cmd.xfer);
|
708 |
p = outbuf; |
709 |
|
710 |
if (bdrv_is_read_only(s->bs)) {
|
711 |
dev_specific_param = 0x80; /* Readonly. */ |
712 |
} else {
|
713 |
dev_specific_param = 0x00;
|
714 |
} |
715 |
|
716 |
if (req->cmd.buf[0] == MODE_SENSE) { |
717 |
p[1] = 0; /* Default media type. */ |
718 |
p[2] = dev_specific_param;
|
719 |
p[3] = 0; /* Block descriptor length. */ |
720 |
p += 4;
|
721 |
} else { /* MODE_SENSE_10 */ |
722 |
p[2] = 0; /* Default media type. */ |
723 |
p[3] = dev_specific_param;
|
724 |
p[6] = p[7] = 0; /* Block descriptor length. */ |
725 |
p += 8;
|
726 |
} |
727 |
|
728 |
bdrv_get_geometry(s->bs, &nb_sectors); |
729 |
if (!dbd && nb_sectors) {
|
730 |
if (req->cmd.buf[0] == MODE_SENSE) { |
731 |
outbuf[3] = 8; /* Block descriptor length */ |
732 |
} else { /* MODE_SENSE_10 */ |
733 |
outbuf[7] = 8; /* Block descriptor length */ |
734 |
} |
735 |
nb_sectors /= s->cluster_size; |
736 |
if (nb_sectors > 0xffffff) |
737 |
nb_sectors = 0;
|
738 |
p[0] = 0; /* media density code */ |
739 |
p[1] = (nb_sectors >> 16) & 0xff; |
740 |
p[2] = (nb_sectors >> 8) & 0xff; |
741 |
p[3] = nb_sectors & 0xff; |
742 |
p[4] = 0; /* reserved */ |
743 |
p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
744 |
p[6] = s->cluster_size * 2; |
745 |
p[7] = 0; |
746 |
p += 8;
|
747 |
} |
748 |
|
749 |
if (page_control == 3) { /* Saved Values */ |
750 |
return -1; /* ILLEGAL_REQUEST */ |
751 |
} |
752 |
|
753 |
switch (page) {
|
754 |
case 0x04: |
755 |
case 0x05: |
756 |
case 0x08: |
757 |
case 0x2a: |
758 |
p += mode_sense_page(req, page, p, page_control); |
759 |
break;
|
760 |
case 0x3f: |
761 |
p += mode_sense_page(req, 0x08, p, page_control);
|
762 |
p += mode_sense_page(req, 0x2a, p, page_control);
|
763 |
break;
|
764 |
default:
|
765 |
return -1; /* ILLEGAL_REQUEST */ |
766 |
} |
767 |
|
768 |
buflen = p - outbuf; |
769 |
/*
|
770 |
* The mode data length field specifies the length in bytes of the
|
771 |
* following data that is available to be transferred. The mode data
|
772 |
* length does not include itself.
|
773 |
*/
|
774 |
if (req->cmd.buf[0] == MODE_SENSE) { |
775 |
outbuf[0] = buflen - 1; |
776 |
} else { /* MODE_SENSE_10 */ |
777 |
outbuf[0] = ((buflen - 2) >> 8) & 0xff; |
778 |
outbuf[1] = (buflen - 2) & 0xff; |
779 |
} |
780 |
if (buflen > req->cmd.xfer)
|
781 |
buflen = req->cmd.xfer; |
782 |
return buflen;
|
783 |
} |
784 |
|
785 |
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) |
786 |
{ |
787 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
788 |
int start_track, format, msf, toclen;
|
789 |
uint64_t nb_sectors; |
790 |
|
791 |
msf = req->cmd.buf[1] & 2; |
792 |
format = req->cmd.buf[2] & 0xf; |
793 |
start_track = req->cmd.buf[6];
|
794 |
bdrv_get_geometry(s->bs, &nb_sectors); |
795 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
796 |
nb_sectors /= s->cluster_size; |
797 |
switch (format) {
|
798 |
case 0: |
799 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
800 |
break;
|
801 |
case 1: |
802 |
/* multi session : only a single session defined */
|
803 |
toclen = 12;
|
804 |
memset(outbuf, 0, 12); |
805 |
outbuf[1] = 0x0a; |
806 |
outbuf[2] = 0x01; |
807 |
outbuf[3] = 0x01; |
808 |
break;
|
809 |
case 2: |
810 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
811 |
break;
|
812 |
default:
|
813 |
return -1; |
814 |
} |
815 |
if (toclen > req->cmd.xfer)
|
816 |
toclen = req->cmd.xfer; |
817 |
return toclen;
|
818 |
} |
819 |
|
820 |
static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf) |
821 |
{ |
822 |
SCSIRequest *req = &r->req; |
823 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
824 |
uint64_t nb_sectors; |
825 |
int buflen = 0; |
826 |
int ret;
|
827 |
|
828 |
switch (req->cmd.buf[0]) { |
829 |
case TEST_UNIT_READY:
|
830 |
if (!bdrv_is_inserted(s->bs))
|
831 |
goto not_ready;
|
832 |
break;
|
833 |
case REQUEST_SENSE:
|
834 |
if (req->cmd.xfer < 4) |
835 |
goto illegal_request;
|
836 |
buflen = scsi_build_sense(s->sense, outbuf, req->cmd.xfer, |
837 |
req->cmd.xfer > 13);
|
838 |
scsi_disk_clear_sense(s); |
839 |
break;
|
840 |
case INQUIRY:
|
841 |
buflen = scsi_disk_emulate_inquiry(req, outbuf); |
842 |
if (buflen < 0) |
843 |
goto illegal_request;
|
844 |
break;
|
845 |
case MODE_SENSE:
|
846 |
case MODE_SENSE_10:
|
847 |
buflen = scsi_disk_emulate_mode_sense(req, outbuf); |
848 |
if (buflen < 0) |
849 |
goto illegal_request;
|
850 |
break;
|
851 |
case READ_TOC:
|
852 |
buflen = scsi_disk_emulate_read_toc(req, outbuf); |
853 |
if (buflen < 0) |
854 |
goto illegal_request;
|
855 |
break;
|
856 |
case RESERVE:
|
857 |
if (req->cmd.buf[1] & 1) |
858 |
goto illegal_request;
|
859 |
break;
|
860 |
case RESERVE_10:
|
861 |
if (req->cmd.buf[1] & 3) |
862 |
goto illegal_request;
|
863 |
break;
|
864 |
case RELEASE:
|
865 |
if (req->cmd.buf[1] & 1) |
866 |
goto illegal_request;
|
867 |
break;
|
868 |
case RELEASE_10:
|
869 |
if (req->cmd.buf[1] & 3) |
870 |
goto illegal_request;
|
871 |
break;
|
872 |
case START_STOP:
|
873 |
if (s->drive_kind == SCSI_CD && (req->cmd.buf[4] & 2)) { |
874 |
/* load/eject medium */
|
875 |
bdrv_eject(s->bs, !(req->cmd.buf[4] & 1)); |
876 |
} |
877 |
break;
|
878 |
case ALLOW_MEDIUM_REMOVAL:
|
879 |
bdrv_set_locked(s->bs, req->cmd.buf[4] & 1); |
880 |
break;
|
881 |
case READ_CAPACITY:
|
882 |
/* The normal LEN field for this command is zero. */
|
883 |
memset(outbuf, 0, 8); |
884 |
bdrv_get_geometry(s->bs, &nb_sectors); |
885 |
if (!nb_sectors)
|
886 |
goto not_ready;
|
887 |
nb_sectors /= s->cluster_size; |
888 |
/* Returned value is the address of the last sector. */
|
889 |
nb_sectors--; |
890 |
/* Remember the new size for read/write sanity checking. */
|
891 |
s->max_lba = nb_sectors; |
892 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
893 |
if (nb_sectors > UINT32_MAX)
|
894 |
nb_sectors = UINT32_MAX; |
895 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
896 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
897 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
898 |
outbuf[3] = nb_sectors & 0xff; |
899 |
outbuf[4] = 0; |
900 |
outbuf[5] = 0; |
901 |
outbuf[6] = s->cluster_size * 2; |
902 |
outbuf[7] = 0; |
903 |
buflen = 8;
|
904 |
break;
|
905 |
case SYNCHRONIZE_CACHE:
|
906 |
ret = bdrv_flush(s->bs); |
907 |
if (ret < 0) { |
908 |
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_FLUSH)) {
|
909 |
return -1; |
910 |
} |
911 |
} |
912 |
break;
|
913 |
case GET_CONFIGURATION:
|
914 |
memset(outbuf, 0, 8); |
915 |
/* ??? This should probably return much more information. For now
|
916 |
just return the basic header indicating the CD-ROM profile. */
|
917 |
outbuf[7] = 8; // CD-ROM |
918 |
buflen = 8;
|
919 |
break;
|
920 |
case SERVICE_ACTION_IN:
|
921 |
/* Service Action In subcommands. */
|
922 |
if ((req->cmd.buf[1] & 31) == 0x10) { |
923 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
924 |
memset(outbuf, 0, req->cmd.xfer);
|
925 |
bdrv_get_geometry(s->bs, &nb_sectors); |
926 |
if (!nb_sectors)
|
927 |
goto not_ready;
|
928 |
nb_sectors /= s->cluster_size; |
929 |
/* Returned value is the address of the last sector. */
|
930 |
nb_sectors--; |
931 |
/* Remember the new size for read/write sanity checking. */
|
932 |
s->max_lba = nb_sectors; |
933 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
934 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
935 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
936 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
937 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
938 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
939 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
940 |
outbuf[7] = nb_sectors & 0xff; |
941 |
outbuf[8] = 0; |
942 |
outbuf[9] = 0; |
943 |
outbuf[10] = s->cluster_size * 2; |
944 |
outbuf[11] = 0; |
945 |
outbuf[12] = 0; |
946 |
outbuf[13] = get_physical_block_exp(&s->qdev.conf);
|
947 |
|
948 |
/* set TPE bit if the format supports discard */
|
949 |
if (s->qdev.conf.discard_granularity) {
|
950 |
outbuf[14] = 0x80; |
951 |
} |
952 |
|
953 |
/* Protection, exponent and lowest lba field left blank. */
|
954 |
buflen = req->cmd.xfer; |
955 |
break;
|
956 |
} |
957 |
DPRINTF("Unsupported Service Action In\n");
|
958 |
goto illegal_request;
|
959 |
case REPORT_LUNS:
|
960 |
if (req->cmd.xfer < 16) |
961 |
goto illegal_request;
|
962 |
memset(outbuf, 0, 16); |
963 |
outbuf[3] = 8; |
964 |
buflen = 16;
|
965 |
break;
|
966 |
case VERIFY:
|
967 |
break;
|
968 |
case REZERO_UNIT:
|
969 |
DPRINTF("Rezero Unit\n");
|
970 |
if (!bdrv_is_inserted(s->bs)) {
|
971 |
goto not_ready;
|
972 |
} |
973 |
break;
|
974 |
default:
|
975 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(INVALID_OPCODE)); |
976 |
return -1; |
977 |
} |
978 |
scsi_req_set_status(r, GOOD, SENSE_CODE(NO_SENSE)); |
979 |
return buflen;
|
980 |
|
981 |
not_ready:
|
982 |
if (!bdrv_is_inserted(s->bs)) {
|
983 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(NO_MEDIUM)); |
984 |
} else {
|
985 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(LUN_NOT_READY)); |
986 |
} |
987 |
return -1; |
988 |
|
989 |
illegal_request:
|
990 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(INVALID_FIELD)); |
991 |
return -1; |
992 |
} |
993 |
|
994 |
/* Execute a scsi command. Returns the length of the data expected by the
|
995 |
command. This will be Positive for data transfers from the device
|
996 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
997 |
and zero if the command does not transfer any data. */
|
998 |
|
999 |
static int32_t scsi_send_command(SCSIRequest *req, uint8_t *buf)
|
1000 |
{ |
1001 |
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req); |
1002 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
1003 |
int32_t len; |
1004 |
uint8_t command; |
1005 |
uint8_t *outbuf; |
1006 |
int rc;
|
1007 |
|
1008 |
command = buf[0];
|
1009 |
outbuf = (uint8_t *)r->iov.iov_base; |
1010 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
1011 |
|
1012 |
if (scsi_req_parse(&r->req, buf) != 0) { |
1013 |
BADF("Unsupported command length, command %x\n", command);
|
1014 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(INVALID_OPCODE)); |
1015 |
return 0; |
1016 |
} |
1017 |
#ifdef DEBUG_SCSI
|
1018 |
{ |
1019 |
int i;
|
1020 |
for (i = 1; i < r->req.cmd.len; i++) { |
1021 |
printf(" 0x%02x", buf[i]);
|
1022 |
} |
1023 |
printf("\n");
|
1024 |
} |
1025 |
#endif
|
1026 |
|
1027 |
if (req->lun) {
|
1028 |
/* Only LUN 0 supported. */
|
1029 |
DPRINTF("Unimplemented LUN %d\n", req->lun);
|
1030 |
if (command != REQUEST_SENSE && command != INQUIRY) {
|
1031 |
scsi_command_complete(r, CHECK_CONDITION, |
1032 |
SENSE_CODE(LUN_NOT_SUPPORTED)); |
1033 |
return 0; |
1034 |
} |
1035 |
} |
1036 |
switch (command) {
|
1037 |
case TEST_UNIT_READY:
|
1038 |
case REQUEST_SENSE:
|
1039 |
case INQUIRY:
|
1040 |
case MODE_SENSE:
|
1041 |
case MODE_SENSE_10:
|
1042 |
case RESERVE:
|
1043 |
case RESERVE_10:
|
1044 |
case RELEASE:
|
1045 |
case RELEASE_10:
|
1046 |
case START_STOP:
|
1047 |
case ALLOW_MEDIUM_REMOVAL:
|
1048 |
case READ_CAPACITY:
|
1049 |
case SYNCHRONIZE_CACHE:
|
1050 |
case READ_TOC:
|
1051 |
case GET_CONFIGURATION:
|
1052 |
case SERVICE_ACTION_IN:
|
1053 |
case REPORT_LUNS:
|
1054 |
case VERIFY:
|
1055 |
case REZERO_UNIT:
|
1056 |
rc = scsi_disk_emulate_command(r, outbuf); |
1057 |
if (rc < 0) { |
1058 |
return 0; |
1059 |
} |
1060 |
|
1061 |
r->iov.iov_len = rc; |
1062 |
break;
|
1063 |
case READ_6:
|
1064 |
case READ_10:
|
1065 |
case READ_12:
|
1066 |
case READ_16:
|
1067 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
1068 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", r->req.cmd.lba, len); |
1069 |
if (r->req.cmd.lba > s->max_lba)
|
1070 |
goto illegal_lba;
|
1071 |
r->sector = r->req.cmd.lba * s->cluster_size; |
1072 |
r->sector_count = len * s->cluster_size; |
1073 |
break;
|
1074 |
case WRITE_6:
|
1075 |
case WRITE_10:
|
1076 |
case WRITE_12:
|
1077 |
case WRITE_16:
|
1078 |
case WRITE_VERIFY:
|
1079 |
case WRITE_VERIFY_12:
|
1080 |
case WRITE_VERIFY_16:
|
1081 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
1082 |
DPRINTF("Write %s(sector %" PRId64 ", count %d)\n", |
1083 |
(command & 0xe) == 0xe ? "And Verify " : "", |
1084 |
r->req.cmd.lba, len); |
1085 |
if (r->req.cmd.lba > s->max_lba)
|
1086 |
goto illegal_lba;
|
1087 |
r->sector = r->req.cmd.lba * s->cluster_size; |
1088 |
r->sector_count = len * s->cluster_size; |
1089 |
break;
|
1090 |
case MODE_SELECT:
|
1091 |
DPRINTF("Mode Select(6) (len %lu)\n", (long)r->req.cmd.xfer); |
1092 |
/* We don't support mode parameter changes.
|
1093 |
Allow the mode parameter header + block descriptors only. */
|
1094 |
if (r->req.cmd.xfer > 12) { |
1095 |
goto fail;
|
1096 |
} |
1097 |
break;
|
1098 |
case MODE_SELECT_10:
|
1099 |
DPRINTF("Mode Select(10) (len %lu)\n", (long)r->req.cmd.xfer); |
1100 |
/* We don't support mode parameter changes.
|
1101 |
Allow the mode parameter header + block descriptors only. */
|
1102 |
if (r->req.cmd.xfer > 16) { |
1103 |
goto fail;
|
1104 |
} |
1105 |
break;
|
1106 |
case SEEK_6:
|
1107 |
case SEEK_10:
|
1108 |
DPRINTF("Seek(%d) (sector %" PRId64 ")\n", command == SEEK_6 ? 6 : 10, |
1109 |
r->req.cmd.lba); |
1110 |
if (r->req.cmd.lba > s->max_lba) {
|
1111 |
goto illegal_lba;
|
1112 |
} |
1113 |
break;
|
1114 |
case WRITE_SAME_16:
|
1115 |
len = r->req.cmd.xfer / s->qdev.blocksize; |
1116 |
|
1117 |
DPRINTF("WRITE SAME(16) (sector %" PRId64 ", count %d)\n", |
1118 |
r->req.cmd.lba, len); |
1119 |
|
1120 |
if (r->req.cmd.lba > s->max_lba) {
|
1121 |
goto illegal_lba;
|
1122 |
} |
1123 |
|
1124 |
/*
|
1125 |
* We only support WRITE SAME with the unmap bit set for now.
|
1126 |
*/
|
1127 |
if (!(buf[1] & 0x8)) { |
1128 |
goto fail;
|
1129 |
} |
1130 |
|
1131 |
rc = bdrv_discard(s->bs, r->req.cmd.lba * s->cluster_size, |
1132 |
len * s->cluster_size); |
1133 |
if (rc < 0) { |
1134 |
/* XXX: better error code ?*/
|
1135 |
goto fail;
|
1136 |
} |
1137 |
|
1138 |
break;
|
1139 |
default:
|
1140 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
1141 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(INVALID_OPCODE)); |
1142 |
return 0; |
1143 |
fail:
|
1144 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(INVALID_FIELD)); |
1145 |
return 0; |
1146 |
illegal_lba:
|
1147 |
scsi_command_complete(r, CHECK_CONDITION, SENSE_CODE(LBA_OUT_OF_RANGE)); |
1148 |
return 0; |
1149 |
} |
1150 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
1151 |
scsi_command_complete(r, GOOD, SENSE_CODE(NO_SENSE)); |
1152 |
} |
1153 |
len = r->sector_count * 512 + r->iov.iov_len;
|
1154 |
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
|
1155 |
return -len;
|
1156 |
} else {
|
1157 |
if (!r->sector_count)
|
1158 |
r->sector_count = -1;
|
1159 |
return len;
|
1160 |
} |
1161 |
} |
1162 |
|
1163 |
static void scsi_disk_reset(DeviceState *dev) |
1164 |
{ |
1165 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); |
1166 |
uint64_t nb_sectors; |
1167 |
|
1168 |
scsi_device_purge_requests(&s->qdev); |
1169 |
|
1170 |
bdrv_get_geometry(s->bs, &nb_sectors); |
1171 |
nb_sectors /= s->cluster_size; |
1172 |
if (nb_sectors) {
|
1173 |
nb_sectors--; |
1174 |
} |
1175 |
s->max_lba = nb_sectors; |
1176 |
} |
1177 |
|
1178 |
static void scsi_destroy(SCSIDevice *dev) |
1179 |
{ |
1180 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1181 |
|
1182 |
scsi_device_purge_requests(&s->qdev); |
1183 |
blockdev_mark_auto_del(s->qdev.conf.bs); |
1184 |
} |
1185 |
|
1186 |
static int scsi_initfn(SCSIDevice *dev, SCSIDriveKind kind) |
1187 |
{ |
1188 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1189 |
DriveInfo *dinfo; |
1190 |
|
1191 |
if (!s->qdev.conf.bs) {
|
1192 |
error_report("scsi-disk: drive property not set");
|
1193 |
return -1; |
1194 |
} |
1195 |
s->bs = s->qdev.conf.bs; |
1196 |
s->drive_kind = kind; |
1197 |
|
1198 |
if (kind == SCSI_HD && !bdrv_is_inserted(s->bs)) {
|
1199 |
error_report("Device needs media, but drive is empty");
|
1200 |
return -1; |
1201 |
} |
1202 |
|
1203 |
if (!s->serial) {
|
1204 |
/* try to fall back to value set with legacy -drive serial=... */
|
1205 |
dinfo = drive_get_by_blockdev(s->bs); |
1206 |
s->serial = qemu_strdup(*dinfo->serial ? dinfo->serial : "0");
|
1207 |
} |
1208 |
|
1209 |
if (!s->version) {
|
1210 |
s->version = qemu_strdup(QEMU_VERSION); |
1211 |
} |
1212 |
|
1213 |
if (bdrv_is_sg(s->bs)) {
|
1214 |
error_report("scsi-disk: unwanted /dev/sg*");
|
1215 |
return -1; |
1216 |
} |
1217 |
|
1218 |
if (kind == SCSI_CD) {
|
1219 |
s->qdev.blocksize = 2048;
|
1220 |
} else {
|
1221 |
s->qdev.blocksize = s->qdev.conf.logical_block_size; |
1222 |
} |
1223 |
s->cluster_size = s->qdev.blocksize / 512;
|
1224 |
s->bs->buffer_alignment = s->qdev.blocksize; |
1225 |
|
1226 |
s->qdev.type = TYPE_DISK; |
1227 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
1228 |
bdrv_set_removable(s->bs, kind == SCSI_CD); |
1229 |
add_boot_device_path(s->qdev.conf.bootindex, &dev->qdev, ",0");
|
1230 |
return 0; |
1231 |
} |
1232 |
|
1233 |
static int scsi_hd_initfn(SCSIDevice *dev) |
1234 |
{ |
1235 |
return scsi_initfn(dev, SCSI_HD);
|
1236 |
} |
1237 |
|
1238 |
static int scsi_cd_initfn(SCSIDevice *dev) |
1239 |
{ |
1240 |
return scsi_initfn(dev, SCSI_CD);
|
1241 |
} |
1242 |
|
1243 |
static int scsi_disk_initfn(SCSIDevice *dev) |
1244 |
{ |
1245 |
SCSIDriveKind kind; |
1246 |
DriveInfo *dinfo; |
1247 |
|
1248 |
if (!dev->conf.bs) {
|
1249 |
kind = SCSI_HD; /* will die in scsi_initfn() */
|
1250 |
} else {
|
1251 |
dinfo = drive_get_by_blockdev(dev->conf.bs); |
1252 |
kind = dinfo->media_cd ? SCSI_CD : SCSI_HD; |
1253 |
} |
1254 |
|
1255 |
return scsi_initfn(dev, kind);
|
1256 |
} |
1257 |
|
1258 |
#define DEFINE_SCSI_DISK_PROPERTIES() \
|
1259 |
DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), \ |
1260 |
DEFINE_PROP_STRING("ver", SCSIDiskState, version), \
|
1261 |
DEFINE_PROP_STRING("serial", SCSIDiskState, serial)
|
1262 |
|
1263 |
static SCSIDeviceInfo scsi_disk_info[] = {
|
1264 |
{ |
1265 |
.qdev.name = "scsi-hd",
|
1266 |
.qdev.fw_name = "disk",
|
1267 |
.qdev.desc = "virtual SCSI disk",
|
1268 |
.qdev.size = sizeof(SCSIDiskState),
|
1269 |
.qdev.reset = scsi_disk_reset, |
1270 |
.init = scsi_hd_initfn, |
1271 |
.destroy = scsi_destroy, |
1272 |
.alloc_req = scsi_new_request, |
1273 |
.free_req = scsi_free_request, |
1274 |
.send_command = scsi_send_command, |
1275 |
.read_data = scsi_read_data, |
1276 |
.write_data = scsi_write_data, |
1277 |
.cancel_io = scsi_cancel_io, |
1278 |
.get_buf = scsi_get_buf, |
1279 |
.get_sense = scsi_get_sense, |
1280 |
.qdev.props = (Property[]) { |
1281 |
DEFINE_SCSI_DISK_PROPERTIES(), |
1282 |
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false), |
1283 |
DEFINE_PROP_END_OF_LIST(), |
1284 |
} |
1285 |
},{ |
1286 |
.qdev.name = "scsi-cd",
|
1287 |
.qdev.fw_name = "disk",
|
1288 |
.qdev.desc = "virtual SCSI CD-ROM",
|
1289 |
.qdev.size = sizeof(SCSIDiskState),
|
1290 |
.qdev.reset = scsi_disk_reset, |
1291 |
.init = scsi_cd_initfn, |
1292 |
.destroy = scsi_destroy, |
1293 |
.alloc_req = scsi_new_request, |
1294 |
.free_req = scsi_free_request, |
1295 |
.send_command = scsi_send_command, |
1296 |
.read_data = scsi_read_data, |
1297 |
.write_data = scsi_write_data, |
1298 |
.cancel_io = scsi_cancel_io, |
1299 |
.get_buf = scsi_get_buf, |
1300 |
.get_sense = scsi_get_sense, |
1301 |
.qdev.props = (Property[]) { |
1302 |
DEFINE_SCSI_DISK_PROPERTIES(), |
1303 |
DEFINE_PROP_END_OF_LIST(), |
1304 |
}, |
1305 |
},{ |
1306 |
.qdev.name = "scsi-disk", /* legacy -device scsi-disk */ |
1307 |
.qdev.fw_name = "disk",
|
1308 |
.qdev.desc = "virtual SCSI disk or CD-ROM (legacy)",
|
1309 |
.qdev.size = sizeof(SCSIDiskState),
|
1310 |
.qdev.reset = scsi_disk_reset, |
1311 |
.init = scsi_disk_initfn, |
1312 |
.destroy = scsi_destroy, |
1313 |
.alloc_req = scsi_new_request, |
1314 |
.free_req = scsi_free_request, |
1315 |
.send_command = scsi_send_command, |
1316 |
.read_data = scsi_read_data, |
1317 |
.write_data = scsi_write_data, |
1318 |
.cancel_io = scsi_cancel_io, |
1319 |
.get_buf = scsi_get_buf, |
1320 |
.get_sense = scsi_get_sense, |
1321 |
.qdev.props = (Property[]) { |
1322 |
DEFINE_SCSI_DISK_PROPERTIES(), |
1323 |
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false), |
1324 |
DEFINE_PROP_END_OF_LIST(), |
1325 |
} |
1326 |
} |
1327 |
}; |
1328 |
|
1329 |
static void scsi_disk_register_devices(void) |
1330 |
{ |
1331 |
int i;
|
1332 |
|
1333 |
for (i = 0; i < ARRAY_SIZE(scsi_disk_info); i++) { |
1334 |
scsi_qdev_register(&scsi_disk_info[i]); |
1335 |
} |
1336 |
} |
1337 |
device_init(scsi_disk_register_devices) |