root / hw / scsi-disk.c @ 0d2e91c1
History | View | Annotate | Download (38.9 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 SCSISense { |
53 |
uint8_t key; |
54 |
} SCSISense; |
55 |
|
56 |
typedef struct SCSIDiskReq { |
57 |
SCSIRequest req; |
58 |
/* ??? We should probably keep track of whether the data transfer is
|
59 |
a read or a write. Currently we rely on the host getting it right. */
|
60 |
/* Both sector and sector_count are in terms of qemu 512 byte blocks. */
|
61 |
uint64_t sector; |
62 |
uint32_t sector_count; |
63 |
struct iovec iov;
|
64 |
QEMUIOVector qiov; |
65 |
uint32_t status; |
66 |
} SCSIDiskReq; |
67 |
|
68 |
struct SCSIDiskState
|
69 |
{ |
70 |
SCSIDevice qdev; |
71 |
BlockDriverState *bs; |
72 |
/* The qemu block layer uses a fixed 512 byte sector size.
|
73 |
This is the number of 512 byte blocks in a single scsi sector. */
|
74 |
int cluster_size;
|
75 |
uint32_t removable; |
76 |
uint64_t max_lba; |
77 |
QEMUBH *bh; |
78 |
char *version;
|
79 |
char *serial;
|
80 |
SCSISense sense; |
81 |
}; |
82 |
|
83 |
static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type); |
84 |
static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf); |
85 |
|
86 |
static SCSIDiskReq *scsi_new_request(SCSIDiskState *s, uint32_t tag,
|
87 |
uint32_t lun) |
88 |
{ |
89 |
SCSIRequest *req; |
90 |
SCSIDiskReq *r; |
91 |
|
92 |
req = scsi_req_alloc(sizeof(SCSIDiskReq), &s->qdev, tag, lun);
|
93 |
r = DO_UPCAST(SCSIDiskReq, req, req); |
94 |
r->iov.iov_base = qemu_blockalign(s->bs, SCSI_DMA_BUF_SIZE); |
95 |
return r;
|
96 |
} |
97 |
|
98 |
static void scsi_remove_request(SCSIDiskReq *r) |
99 |
{ |
100 |
qemu_vfree(r->iov.iov_base); |
101 |
scsi_req_free(&r->req); |
102 |
} |
103 |
|
104 |
static SCSIDiskReq *scsi_find_request(SCSIDiskState *s, uint32_t tag)
|
105 |
{ |
106 |
return DO_UPCAST(SCSIDiskReq, req, scsi_req_find(&s->qdev, tag));
|
107 |
} |
108 |
|
109 |
static void scsi_disk_clear_sense(SCSIDiskState *s) |
110 |
{ |
111 |
memset(&s->sense, 0, sizeof(s->sense)); |
112 |
} |
113 |
|
114 |
static void scsi_disk_set_sense(SCSIDiskState *s, uint8_t key) |
115 |
{ |
116 |
s->sense.key = key; |
117 |
} |
118 |
|
119 |
static void scsi_req_set_status(SCSIDiskReq *r, int status, int sense_code) |
120 |
{ |
121 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
122 |
|
123 |
r->req.status = status; |
124 |
scsi_disk_set_sense(s, sense_code); |
125 |
} |
126 |
|
127 |
/* Helper function for command completion. */
|
128 |
static void scsi_command_complete(SCSIDiskReq *r, int status, int sense) |
129 |
{ |
130 |
DPRINTF("Command complete tag=0x%x status=%d sense=%d\n",
|
131 |
r->req.tag, status, sense); |
132 |
scsi_req_set_status(r, status, sense); |
133 |
scsi_req_complete(&r->req); |
134 |
scsi_remove_request(r); |
135 |
} |
136 |
|
137 |
/* Cancel a pending data transfer. */
|
138 |
static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) |
139 |
{ |
140 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
141 |
SCSIDiskReq *r; |
142 |
DPRINTF("Cancel tag=0x%x\n", tag);
|
143 |
r = scsi_find_request(s, tag); |
144 |
if (r) {
|
145 |
if (r->req.aiocb)
|
146 |
bdrv_aio_cancel(r->req.aiocb); |
147 |
r->req.aiocb = NULL;
|
148 |
scsi_remove_request(r); |
149 |
} |
150 |
} |
151 |
|
152 |
static void scsi_read_complete(void * opaque, int ret) |
153 |
{ |
154 |
SCSIDiskReq *r = (SCSIDiskReq *)opaque; |
155 |
int n;
|
156 |
|
157 |
r->req.aiocb = NULL;
|
158 |
|
159 |
if (ret) {
|
160 |
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_READ)) {
|
161 |
return;
|
162 |
} |
163 |
} |
164 |
|
165 |
DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->iov.iov_len);
|
166 |
|
167 |
n = r->iov.iov_len / 512;
|
168 |
r->sector += n; |
169 |
r->sector_count -= n; |
170 |
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len); |
171 |
} |
172 |
|
173 |
|
174 |
static void scsi_read_request(SCSIDiskReq *r) |
175 |
{ |
176 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
177 |
uint32_t n; |
178 |
|
179 |
if (r->sector_count == (uint32_t)-1) { |
180 |
DPRINTF("Read buf_len=%zd\n", r->iov.iov_len);
|
181 |
r->sector_count = 0;
|
182 |
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len); |
183 |
return;
|
184 |
} |
185 |
DPRINTF("Read sector_count=%d\n", r->sector_count);
|
186 |
if (r->sector_count == 0) { |
187 |
scsi_command_complete(r, GOOD, NO_SENSE); |
188 |
return;
|
189 |
} |
190 |
|
191 |
/* No data transfer may already be in progress */
|
192 |
assert(r->req.aiocb == NULL);
|
193 |
|
194 |
n = r->sector_count; |
195 |
if (n > SCSI_DMA_BUF_SIZE / 512) |
196 |
n = SCSI_DMA_BUF_SIZE / 512;
|
197 |
|
198 |
r->iov.iov_len = n * 512;
|
199 |
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
|
200 |
r->req.aiocb = bdrv_aio_readv(s->bs, r->sector, &r->qiov, n, |
201 |
scsi_read_complete, r); |
202 |
if (r->req.aiocb == NULL) { |
203 |
scsi_read_complete(r, -EIO); |
204 |
} |
205 |
} |
206 |
|
207 |
/* Read more data from scsi device into buffer. */
|
208 |
static void scsi_read_data(SCSIDevice *d, uint32_t tag) |
209 |
{ |
210 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
211 |
SCSIDiskReq *r; |
212 |
|
213 |
r = scsi_find_request(s, tag); |
214 |
if (!r) {
|
215 |
BADF("Bad read tag 0x%x\n", tag);
|
216 |
/* ??? This is the wrong error. */
|
217 |
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
218 |
return;
|
219 |
} |
220 |
|
221 |
scsi_read_request(r); |
222 |
} |
223 |
|
224 |
static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type) |
225 |
{ |
226 |
int is_read = (type == SCSI_REQ_STATUS_RETRY_READ);
|
227 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
228 |
BlockErrorAction action = bdrv_get_on_error(s->bs, is_read); |
229 |
|
230 |
if (action == BLOCK_ERR_IGNORE) {
|
231 |
bdrv_mon_event(s->bs, BDRV_ACTION_IGNORE, is_read); |
232 |
return 0; |
233 |
} |
234 |
|
235 |
if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC)
|
236 |
|| action == BLOCK_ERR_STOP_ANY) { |
237 |
|
238 |
type &= SCSI_REQ_STATUS_RETRY_TYPE_MASK; |
239 |
r->status |= SCSI_REQ_STATUS_RETRY | type; |
240 |
|
241 |
bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read); |
242 |
vm_stop(VMSTOP_DISKFULL); |
243 |
} else {
|
244 |
if (type == SCSI_REQ_STATUS_RETRY_READ) {
|
245 |
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, 0);
|
246 |
} |
247 |
scsi_command_complete(r, CHECK_CONDITION, |
248 |
HARDWARE_ERROR); |
249 |
bdrv_mon_event(s->bs, BDRV_ACTION_REPORT, is_read); |
250 |
} |
251 |
|
252 |
return 1; |
253 |
} |
254 |
|
255 |
static void scsi_write_complete(void * opaque, int ret) |
256 |
{ |
257 |
SCSIDiskReq *r = (SCSIDiskReq *)opaque; |
258 |
uint32_t len; |
259 |
uint32_t n; |
260 |
|
261 |
r->req.aiocb = NULL;
|
262 |
|
263 |
if (ret) {
|
264 |
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_WRITE)) {
|
265 |
return;
|
266 |
} |
267 |
} |
268 |
|
269 |
n = r->iov.iov_len / 512;
|
270 |
r->sector += n; |
271 |
r->sector_count -= n; |
272 |
if (r->sector_count == 0) { |
273 |
scsi_command_complete(r, GOOD, NO_SENSE); |
274 |
} else {
|
275 |
len = r->sector_count * 512;
|
276 |
if (len > SCSI_DMA_BUF_SIZE) {
|
277 |
len = SCSI_DMA_BUF_SIZE; |
278 |
} |
279 |
r->iov.iov_len = len; |
280 |
DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, len);
|
281 |
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len); |
282 |
} |
283 |
} |
284 |
|
285 |
static void scsi_write_request(SCSIDiskReq *r) |
286 |
{ |
287 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
288 |
uint32_t n; |
289 |
|
290 |
/* No data transfer may already be in progress */
|
291 |
assert(r->req.aiocb == NULL);
|
292 |
|
293 |
n = r->iov.iov_len / 512;
|
294 |
if (n) {
|
295 |
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
|
296 |
r->req.aiocb = bdrv_aio_writev(s->bs, r->sector, &r->qiov, n, |
297 |
scsi_write_complete, r); |
298 |
if (r->req.aiocb == NULL) { |
299 |
scsi_write_complete(r, -EIO); |
300 |
} |
301 |
} else {
|
302 |
/* Invoke completion routine to fetch data from host. */
|
303 |
scsi_write_complete(r, 0);
|
304 |
} |
305 |
} |
306 |
|
307 |
/* Write data to a scsi device. Returns nonzero on failure.
|
308 |
The transfer may complete asynchronously. */
|
309 |
static int scsi_write_data(SCSIDevice *d, uint32_t tag) |
310 |
{ |
311 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
312 |
SCSIDiskReq *r; |
313 |
|
314 |
DPRINTF("Write data tag=0x%x\n", tag);
|
315 |
r = scsi_find_request(s, tag); |
316 |
if (!r) {
|
317 |
BADF("Bad write tag 0x%x\n", tag);
|
318 |
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
319 |
return 1; |
320 |
} |
321 |
|
322 |
scsi_write_request(r); |
323 |
|
324 |
return 0; |
325 |
} |
326 |
|
327 |
static void scsi_dma_restart_bh(void *opaque) |
328 |
{ |
329 |
SCSIDiskState *s = opaque; |
330 |
SCSIRequest *req; |
331 |
SCSIDiskReq *r; |
332 |
|
333 |
qemu_bh_delete(s->bh); |
334 |
s->bh = NULL;
|
335 |
|
336 |
QTAILQ_FOREACH(req, &s->qdev.requests, next) { |
337 |
r = DO_UPCAST(SCSIDiskReq, req, req); |
338 |
if (r->status & SCSI_REQ_STATUS_RETRY) {
|
339 |
int status = r->status;
|
340 |
int ret;
|
341 |
|
342 |
r->status &= |
343 |
~(SCSI_REQ_STATUS_RETRY | SCSI_REQ_STATUS_RETRY_TYPE_MASK); |
344 |
|
345 |
switch (status & SCSI_REQ_STATUS_RETRY_TYPE_MASK) {
|
346 |
case SCSI_REQ_STATUS_RETRY_READ:
|
347 |
scsi_read_request(r); |
348 |
break;
|
349 |
case SCSI_REQ_STATUS_RETRY_WRITE:
|
350 |
scsi_write_request(r); |
351 |
break;
|
352 |
case SCSI_REQ_STATUS_RETRY_FLUSH:
|
353 |
ret = scsi_disk_emulate_command(r, r->iov.iov_base); |
354 |
if (ret == 0) { |
355 |
scsi_command_complete(r, GOOD, NO_SENSE); |
356 |
} |
357 |
} |
358 |
} |
359 |
} |
360 |
} |
361 |
|
362 |
static void scsi_dma_restart_cb(void *opaque, int running, int reason) |
363 |
{ |
364 |
SCSIDiskState *s = opaque; |
365 |
|
366 |
if (!running)
|
367 |
return;
|
368 |
|
369 |
if (!s->bh) {
|
370 |
s->bh = qemu_bh_new(scsi_dma_restart_bh, s); |
371 |
qemu_bh_schedule(s->bh); |
372 |
} |
373 |
} |
374 |
|
375 |
/* Return a pointer to the data buffer. */
|
376 |
static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
|
377 |
{ |
378 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
379 |
SCSIDiskReq *r; |
380 |
|
381 |
r = scsi_find_request(s, tag); |
382 |
if (!r) {
|
383 |
BADF("Bad buffer tag 0x%x\n", tag);
|
384 |
return NULL; |
385 |
} |
386 |
return (uint8_t *)r->iov.iov_base;
|
387 |
} |
388 |
|
389 |
static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) |
390 |
{ |
391 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
392 |
int buflen = 0; |
393 |
|
394 |
if (req->cmd.buf[1] & 0x2) { |
395 |
/* Command support data - optional, not implemented */
|
396 |
BADF("optional INQUIRY command support request not implemented\n");
|
397 |
return -1; |
398 |
} |
399 |
|
400 |
if (req->cmd.buf[1] & 0x1) { |
401 |
/* Vital product data */
|
402 |
uint8_t page_code = req->cmd.buf[2];
|
403 |
if (req->cmd.xfer < 4) { |
404 |
BADF("Error: Inquiry (EVPD[%02X]) buffer size %zd is "
|
405 |
"less than 4\n", page_code, req->cmd.xfer);
|
406 |
return -1; |
407 |
} |
408 |
|
409 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
|
410 |
outbuf[buflen++] = 5;
|
411 |
} else {
|
412 |
outbuf[buflen++] = 0;
|
413 |
} |
414 |
outbuf[buflen++] = page_code ; // this page
|
415 |
outbuf[buflen++] = 0x00;
|
416 |
|
417 |
switch (page_code) {
|
418 |
case 0x00: /* Supported page codes, mandatory */ |
419 |
{ |
420 |
int pages;
|
421 |
DPRINTF("Inquiry EVPD[Supported pages] "
|
422 |
"buffer size %zd\n", req->cmd.xfer);
|
423 |
pages = buflen++; |
424 |
outbuf[buflen++] = 0x00; // list of supported pages (this page) |
425 |
outbuf[buflen++] = 0x80; // unit serial number |
426 |
outbuf[buflen++] = 0x83; // device identification |
427 |
if (bdrv_get_type_hint(s->bs) != BDRV_TYPE_CDROM) {
|
428 |
outbuf[buflen++] = 0xb0; // block limits |
429 |
outbuf[buflen++] = 0xb2; // thin provisioning |
430 |
} |
431 |
outbuf[pages] = buflen - pages - 1; // number of pages |
432 |
break;
|
433 |
} |
434 |
case 0x80: /* Device serial number, optional */ |
435 |
{ |
436 |
int l = strlen(s->serial);
|
437 |
|
438 |
if (l > req->cmd.xfer)
|
439 |
l = req->cmd.xfer; |
440 |
if (l > 20) |
441 |
l = 20;
|
442 |
|
443 |
DPRINTF("Inquiry EVPD[Serial number] "
|
444 |
"buffer size %zd\n", req->cmd.xfer);
|
445 |
outbuf[buflen++] = l; |
446 |
memcpy(outbuf+buflen, s->serial, l); |
447 |
buflen += l; |
448 |
break;
|
449 |
} |
450 |
|
451 |
case 0x83: /* Device identification page, mandatory */ |
452 |
{ |
453 |
int max_len = 255 - 8; |
454 |
int id_len = strlen(bdrv_get_device_name(s->bs));
|
455 |
|
456 |
if (id_len > max_len)
|
457 |
id_len = max_len; |
458 |
DPRINTF("Inquiry EVPD[Device identification] "
|
459 |
"buffer size %zd\n", req->cmd.xfer);
|
460 |
|
461 |
outbuf[buflen++] = 4 + id_len;
|
462 |
outbuf[buflen++] = 0x2; // ASCII |
463 |
outbuf[buflen++] = 0; // not officially assigned |
464 |
outbuf[buflen++] = 0; // reserved |
465 |
outbuf[buflen++] = id_len; // length of data following
|
466 |
|
467 |
memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len); |
468 |
buflen += id_len; |
469 |
break;
|
470 |
} |
471 |
case 0xb0: /* block limits */ |
472 |
{ |
473 |
unsigned int unmap_sectors = |
474 |
s->qdev.conf.discard_granularity / s->qdev.blocksize; |
475 |
unsigned int min_io_size = |
476 |
s->qdev.conf.min_io_size / s->qdev.blocksize; |
477 |
unsigned int opt_io_size = |
478 |
s->qdev.conf.opt_io_size / s->qdev.blocksize; |
479 |
|
480 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
|
481 |
DPRINTF("Inquiry (EVPD[%02X] not supported for CDROM\n",
|
482 |
page_code); |
483 |
return -1; |
484 |
} |
485 |
/* required VPD size with unmap support */
|
486 |
outbuf[3] = buflen = 0x3c; |
487 |
|
488 |
memset(outbuf + 4, 0, buflen - 4); |
489 |
|
490 |
/* optimal transfer length granularity */
|
491 |
outbuf[6] = (min_io_size >> 8) & 0xff; |
492 |
outbuf[7] = min_io_size & 0xff; |
493 |
|
494 |
/* optimal transfer length */
|
495 |
outbuf[12] = (opt_io_size >> 24) & 0xff; |
496 |
outbuf[13] = (opt_io_size >> 16) & 0xff; |
497 |
outbuf[14] = (opt_io_size >> 8) & 0xff; |
498 |
outbuf[15] = opt_io_size & 0xff; |
499 |
|
500 |
/* optimal unmap granularity */
|
501 |
outbuf[28] = (unmap_sectors >> 24) & 0xff; |
502 |
outbuf[29] = (unmap_sectors >> 16) & 0xff; |
503 |
outbuf[30] = (unmap_sectors >> 8) & 0xff; |
504 |
outbuf[31] = unmap_sectors & 0xff; |
505 |
break;
|
506 |
} |
507 |
case 0xb2: /* thin provisioning */ |
508 |
{ |
509 |
outbuf[3] = buflen = 8; |
510 |
outbuf[4] = 0; |
511 |
outbuf[5] = 0x40; /* write same with unmap supported */ |
512 |
outbuf[6] = 0; |
513 |
outbuf[7] = 0; |
514 |
break;
|
515 |
} |
516 |
default:
|
517 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
518 |
"buffer size %zd\n", page_code, req->cmd.xfer);
|
519 |
return -1; |
520 |
} |
521 |
/* done with EVPD */
|
522 |
return buflen;
|
523 |
} |
524 |
|
525 |
/* Standard INQUIRY data */
|
526 |
if (req->cmd.buf[2] != 0) { |
527 |
BADF("Error: Inquiry (STANDARD) page or code "
|
528 |
"is non-zero [%02X]\n", req->cmd.buf[2]); |
529 |
return -1; |
530 |
} |
531 |
|
532 |
/* PAGE CODE == 0 */
|
533 |
if (req->cmd.xfer < 5) { |
534 |
BADF("Error: Inquiry (STANDARD) buffer size %zd "
|
535 |
"is less than 5\n", req->cmd.xfer);
|
536 |
return -1; |
537 |
} |
538 |
|
539 |
buflen = req->cmd.xfer; |
540 |
if (buflen > SCSI_MAX_INQUIRY_LEN)
|
541 |
buflen = SCSI_MAX_INQUIRY_LEN; |
542 |
|
543 |
memset(outbuf, 0, buflen);
|
544 |
|
545 |
if (req->lun || req->cmd.buf[1] >> 5) { |
546 |
outbuf[0] = 0x7f; /* LUN not supported */ |
547 |
return buflen;
|
548 |
} |
549 |
|
550 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
|
551 |
outbuf[0] = 5; |
552 |
outbuf[1] = 0x80; |
553 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
554 |
} else {
|
555 |
outbuf[0] = 0; |
556 |
outbuf[1] = s->removable ? 0x80 : 0; |
557 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
558 |
} |
559 |
memcpy(&outbuf[8], "QEMU ", 8); |
560 |
memset(&outbuf[32], 0, 4); |
561 |
memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version))); |
562 |
/*
|
563 |
* We claim conformance to SPC-3, which is required for guests
|
564 |
* to ask for modern features like READ CAPACITY(16) or the
|
565 |
* block characteristics VPD page by default. Not all of SPC-3
|
566 |
* is actually implemented, but we're good enough.
|
567 |
*/
|
568 |
outbuf[2] = 5; |
569 |
outbuf[3] = 2; /* Format 2 */ |
570 |
|
571 |
if (buflen > 36) { |
572 |
outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ |
573 |
} else {
|
574 |
/* If the allocation length of CDB is too small,
|
575 |
the additional length is not adjusted */
|
576 |
outbuf[4] = 36 - 5; |
577 |
} |
578 |
|
579 |
/* Sync data transfer and TCQ. */
|
580 |
outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0); |
581 |
return buflen;
|
582 |
} |
583 |
|
584 |
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p, |
585 |
int page_control)
|
586 |
{ |
587 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
588 |
BlockDriverState *bdrv = s->bs; |
589 |
int cylinders, heads, secs;
|
590 |
|
591 |
/*
|
592 |
* If Changeable Values are requested, a mask denoting those mode parameters
|
593 |
* that are changeable shall be returned. As we currently don't support
|
594 |
* parameter changes via MODE_SELECT all bits are returned set to zero.
|
595 |
* The buffer was already menset to zero by the caller of this function.
|
596 |
*/
|
597 |
switch (page) {
|
598 |
case 4: /* Rigid disk device geometry page. */ |
599 |
p[0] = 4; |
600 |
p[1] = 0x16; |
601 |
if (page_control == 1) { /* Changeable Values */ |
602 |
return p[1] + 2; |
603 |
} |
604 |
/* if a geometry hint is available, use it */
|
605 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
606 |
p[2] = (cylinders >> 16) & 0xff; |
607 |
p[3] = (cylinders >> 8) & 0xff; |
608 |
p[4] = cylinders & 0xff; |
609 |
p[5] = heads & 0xff; |
610 |
/* Write precomp start cylinder, disabled */
|
611 |
p[6] = (cylinders >> 16) & 0xff; |
612 |
p[7] = (cylinders >> 8) & 0xff; |
613 |
p[8] = cylinders & 0xff; |
614 |
/* Reduced current start cylinder, disabled */
|
615 |
p[9] = (cylinders >> 16) & 0xff; |
616 |
p[10] = (cylinders >> 8) & 0xff; |
617 |
p[11] = cylinders & 0xff; |
618 |
/* Device step rate [ns], 200ns */
|
619 |
p[12] = 0; |
620 |
p[13] = 200; |
621 |
/* Landing zone cylinder */
|
622 |
p[14] = 0xff; |
623 |
p[15] = 0xff; |
624 |
p[16] = 0xff; |
625 |
/* Medium rotation rate [rpm], 5400 rpm */
|
626 |
p[20] = (5400 >> 8) & 0xff; |
627 |
p[21] = 5400 & 0xff; |
628 |
return p[1] + 2; |
629 |
|
630 |
case 5: /* Flexible disk device geometry page. */ |
631 |
p[0] = 5; |
632 |
p[1] = 0x1e; |
633 |
if (page_control == 1) { /* Changeable Values */ |
634 |
return p[1] + 2; |
635 |
} |
636 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
637 |
p[2] = 5000 >> 8; |
638 |
p[3] = 5000 & 0xff; |
639 |
/* if a geometry hint is available, use it */
|
640 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
641 |
p[4] = heads & 0xff; |
642 |
p[5] = secs & 0xff; |
643 |
p[6] = s->cluster_size * 2; |
644 |
p[8] = (cylinders >> 8) & 0xff; |
645 |
p[9] = cylinders & 0xff; |
646 |
/* Write precomp start cylinder, disabled */
|
647 |
p[10] = (cylinders >> 8) & 0xff; |
648 |
p[11] = cylinders & 0xff; |
649 |
/* Reduced current start cylinder, disabled */
|
650 |
p[12] = (cylinders >> 8) & 0xff; |
651 |
p[13] = cylinders & 0xff; |
652 |
/* Device step rate [100us], 100us */
|
653 |
p[14] = 0; |
654 |
p[15] = 1; |
655 |
/* Device step pulse width [us], 1us */
|
656 |
p[16] = 1; |
657 |
/* Device head settle delay [100us], 100us */
|
658 |
p[17] = 0; |
659 |
p[18] = 1; |
660 |
/* Motor on delay [0.1s], 0.1s */
|
661 |
p[19] = 1; |
662 |
/* Motor off delay [0.1s], 0.1s */
|
663 |
p[20] = 1; |
664 |
/* Medium rotation rate [rpm], 5400 rpm */
|
665 |
p[28] = (5400 >> 8) & 0xff; |
666 |
p[29] = 5400 & 0xff; |
667 |
return p[1] + 2; |
668 |
|
669 |
case 8: /* Caching page. */ |
670 |
p[0] = 8; |
671 |
p[1] = 0x12; |
672 |
if (page_control == 1) { /* Changeable Values */ |
673 |
return p[1] + 2; |
674 |
} |
675 |
if (bdrv_enable_write_cache(s->bs)) {
|
676 |
p[2] = 4; /* WCE */ |
677 |
} |
678 |
return p[1] + 2; |
679 |
|
680 |
case 0x2a: /* CD Capabilities and Mechanical Status page. */ |
681 |
if (bdrv_get_type_hint(bdrv) != BDRV_TYPE_CDROM)
|
682 |
return 0; |
683 |
p[0] = 0x2a; |
684 |
p[1] = 0x14; |
685 |
if (page_control == 1) { /* Changeable Values */ |
686 |
return p[1] + 2; |
687 |
} |
688 |
p[2] = 3; // CD-R & CD-RW read |
689 |
p[3] = 0; // Writing not supported |
690 |
p[4] = 0x7f; /* Audio, composite, digital out, |
691 |
mode 2 form 1&2, multi session */
|
692 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
693 |
RW corrected, C2 errors, ISRC,
|
694 |
UPC, Bar code */
|
695 |
p[6] = 0x2d | (bdrv_is_locked(s->bs)? 2 : 0); |
696 |
/* Locking supported, jumper present, eject, tray */
|
697 |
p[7] = 0; /* no volume & mute control, no |
698 |
changer */
|
699 |
p[8] = (50 * 176) >> 8; // 50x read speed |
700 |
p[9] = (50 * 176) & 0xff; |
701 |
p[10] = 0 >> 8; // No volume |
702 |
p[11] = 0 & 0xff; |
703 |
p[12] = 2048 >> 8; // 2M buffer |
704 |
p[13] = 2048 & 0xff; |
705 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
706 |
p[15] = (16 * 176) & 0xff; |
707 |
p[18] = (16 * 176) >> 8; // 16x write speed |
708 |
p[19] = (16 * 176) & 0xff; |
709 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
710 |
p[21] = (16 * 176) & 0xff; |
711 |
return p[1] + 2; |
712 |
|
713 |
default:
|
714 |
return 0; |
715 |
} |
716 |
} |
717 |
|
718 |
static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf) |
719 |
{ |
720 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
721 |
uint64_t nb_sectors; |
722 |
int page, dbd, buflen, page_control;
|
723 |
uint8_t *p; |
724 |
uint8_t dev_specific_param; |
725 |
|
726 |
dbd = req->cmd.buf[1] & 0x8; |
727 |
page = req->cmd.buf[2] & 0x3f; |
728 |
page_control = (req->cmd.buf[2] & 0xc0) >> 6; |
729 |
DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n",
|
730 |
(req->cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, req->cmd.xfer, page_control); |
731 |
memset(outbuf, 0, req->cmd.xfer);
|
732 |
p = outbuf; |
733 |
|
734 |
if (bdrv_is_read_only(s->bs)) {
|
735 |
dev_specific_param = 0x80; /* Readonly. */ |
736 |
} else {
|
737 |
dev_specific_param = 0x00;
|
738 |
} |
739 |
|
740 |
if (req->cmd.buf[0] == MODE_SENSE) { |
741 |
p[1] = 0; /* Default media type. */ |
742 |
p[2] = dev_specific_param;
|
743 |
p[3] = 0; /* Block descriptor length. */ |
744 |
p += 4;
|
745 |
} else { /* MODE_SENSE_10 */ |
746 |
p[2] = 0; /* Default media type. */ |
747 |
p[3] = dev_specific_param;
|
748 |
p[6] = p[7] = 0; /* Block descriptor length. */ |
749 |
p += 8;
|
750 |
} |
751 |
|
752 |
bdrv_get_geometry(s->bs, &nb_sectors); |
753 |
if (!dbd && nb_sectors) {
|
754 |
if (req->cmd.buf[0] == MODE_SENSE) { |
755 |
outbuf[3] = 8; /* Block descriptor length */ |
756 |
} else { /* MODE_SENSE_10 */ |
757 |
outbuf[7] = 8; /* Block descriptor length */ |
758 |
} |
759 |
nb_sectors /= s->cluster_size; |
760 |
if (nb_sectors > 0xffffff) |
761 |
nb_sectors = 0;
|
762 |
p[0] = 0; /* media density code */ |
763 |
p[1] = (nb_sectors >> 16) & 0xff; |
764 |
p[2] = (nb_sectors >> 8) & 0xff; |
765 |
p[3] = nb_sectors & 0xff; |
766 |
p[4] = 0; /* reserved */ |
767 |
p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
768 |
p[6] = s->cluster_size * 2; |
769 |
p[7] = 0; |
770 |
p += 8;
|
771 |
} |
772 |
|
773 |
if (page_control == 3) { /* Saved Values */ |
774 |
return -1; /* ILLEGAL_REQUEST */ |
775 |
} |
776 |
|
777 |
switch (page) {
|
778 |
case 0x04: |
779 |
case 0x05: |
780 |
case 0x08: |
781 |
case 0x2a: |
782 |
p += mode_sense_page(req, page, p, page_control); |
783 |
break;
|
784 |
case 0x3f: |
785 |
p += mode_sense_page(req, 0x08, p, page_control);
|
786 |
p += mode_sense_page(req, 0x2a, p, page_control);
|
787 |
break;
|
788 |
default:
|
789 |
return -1; /* ILLEGAL_REQUEST */ |
790 |
} |
791 |
|
792 |
buflen = p - outbuf; |
793 |
/*
|
794 |
* The mode data length field specifies the length in bytes of the
|
795 |
* following data that is available to be transferred. The mode data
|
796 |
* length does not include itself.
|
797 |
*/
|
798 |
if (req->cmd.buf[0] == MODE_SENSE) { |
799 |
outbuf[0] = buflen - 1; |
800 |
} else { /* MODE_SENSE_10 */ |
801 |
outbuf[0] = ((buflen - 2) >> 8) & 0xff; |
802 |
outbuf[1] = (buflen - 2) & 0xff; |
803 |
} |
804 |
if (buflen > req->cmd.xfer)
|
805 |
buflen = req->cmd.xfer; |
806 |
return buflen;
|
807 |
} |
808 |
|
809 |
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) |
810 |
{ |
811 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
812 |
int start_track, format, msf, toclen;
|
813 |
uint64_t nb_sectors; |
814 |
|
815 |
msf = req->cmd.buf[1] & 2; |
816 |
format = req->cmd.buf[2] & 0xf; |
817 |
start_track = req->cmd.buf[6];
|
818 |
bdrv_get_geometry(s->bs, &nb_sectors); |
819 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
820 |
nb_sectors /= s->cluster_size; |
821 |
switch (format) {
|
822 |
case 0: |
823 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
824 |
break;
|
825 |
case 1: |
826 |
/* multi session : only a single session defined */
|
827 |
toclen = 12;
|
828 |
memset(outbuf, 0, 12); |
829 |
outbuf[1] = 0x0a; |
830 |
outbuf[2] = 0x01; |
831 |
outbuf[3] = 0x01; |
832 |
break;
|
833 |
case 2: |
834 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
835 |
break;
|
836 |
default:
|
837 |
return -1; |
838 |
} |
839 |
if (toclen > req->cmd.xfer)
|
840 |
toclen = req->cmd.xfer; |
841 |
return toclen;
|
842 |
} |
843 |
|
844 |
static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf) |
845 |
{ |
846 |
SCSIRequest *req = &r->req; |
847 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
848 |
uint64_t nb_sectors; |
849 |
int buflen = 0; |
850 |
int ret;
|
851 |
|
852 |
switch (req->cmd.buf[0]) { |
853 |
case TEST_UNIT_READY:
|
854 |
if (!bdrv_is_inserted(s->bs))
|
855 |
goto not_ready;
|
856 |
break;
|
857 |
case REQUEST_SENSE:
|
858 |
if (req->cmd.xfer < 4) |
859 |
goto illegal_request;
|
860 |
memset(outbuf, 0, 4); |
861 |
buflen = 4;
|
862 |
if (s->sense.key == NOT_READY && req->cmd.xfer >= 18) { |
863 |
memset(outbuf, 0, 18); |
864 |
buflen = 18;
|
865 |
outbuf[7] = 10; |
866 |
/* asc 0x3a, ascq 0: Medium not present */
|
867 |
outbuf[12] = 0x3a; |
868 |
outbuf[13] = 0; |
869 |
} |
870 |
outbuf[0] = 0xf0; |
871 |
outbuf[1] = 0; |
872 |
outbuf[2] = s->sense.key;
|
873 |
scsi_disk_clear_sense(s); |
874 |
break;
|
875 |
case INQUIRY:
|
876 |
buflen = scsi_disk_emulate_inquiry(req, outbuf); |
877 |
if (buflen < 0) |
878 |
goto illegal_request;
|
879 |
break;
|
880 |
case MODE_SENSE:
|
881 |
case MODE_SENSE_10:
|
882 |
buflen = scsi_disk_emulate_mode_sense(req, outbuf); |
883 |
if (buflen < 0) |
884 |
goto illegal_request;
|
885 |
break;
|
886 |
case READ_TOC:
|
887 |
buflen = scsi_disk_emulate_read_toc(req, outbuf); |
888 |
if (buflen < 0) |
889 |
goto illegal_request;
|
890 |
break;
|
891 |
case RESERVE:
|
892 |
if (req->cmd.buf[1] & 1) |
893 |
goto illegal_request;
|
894 |
break;
|
895 |
case RESERVE_10:
|
896 |
if (req->cmd.buf[1] & 3) |
897 |
goto illegal_request;
|
898 |
break;
|
899 |
case RELEASE:
|
900 |
if (req->cmd.buf[1] & 1) |
901 |
goto illegal_request;
|
902 |
break;
|
903 |
case RELEASE_10:
|
904 |
if (req->cmd.buf[1] & 3) |
905 |
goto illegal_request;
|
906 |
break;
|
907 |
case START_STOP:
|
908 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM && (req->cmd.buf[4] & 2)) { |
909 |
/* load/eject medium */
|
910 |
bdrv_eject(s->bs, !(req->cmd.buf[4] & 1)); |
911 |
} |
912 |
break;
|
913 |
case ALLOW_MEDIUM_REMOVAL:
|
914 |
bdrv_set_locked(s->bs, req->cmd.buf[4] & 1); |
915 |
break;
|
916 |
case READ_CAPACITY:
|
917 |
/* The normal LEN field for this command is zero. */
|
918 |
memset(outbuf, 0, 8); |
919 |
bdrv_get_geometry(s->bs, &nb_sectors); |
920 |
if (!nb_sectors)
|
921 |
goto not_ready;
|
922 |
nb_sectors /= s->cluster_size; |
923 |
/* Returned value is the address of the last sector. */
|
924 |
nb_sectors--; |
925 |
/* Remember the new size for read/write sanity checking. */
|
926 |
s->max_lba = nb_sectors; |
927 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
928 |
if (nb_sectors > UINT32_MAX)
|
929 |
nb_sectors = UINT32_MAX; |
930 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
931 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
932 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
933 |
outbuf[3] = nb_sectors & 0xff; |
934 |
outbuf[4] = 0; |
935 |
outbuf[5] = 0; |
936 |
outbuf[6] = s->cluster_size * 2; |
937 |
outbuf[7] = 0; |
938 |
buflen = 8;
|
939 |
break;
|
940 |
case SYNCHRONIZE_CACHE:
|
941 |
ret = bdrv_flush(s->bs); |
942 |
if (ret < 0) { |
943 |
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_FLUSH)) {
|
944 |
return -1; |
945 |
} |
946 |
} |
947 |
break;
|
948 |
case GET_CONFIGURATION:
|
949 |
memset(outbuf, 0, 8); |
950 |
/* ??? This should probably return much more information. For now
|
951 |
just return the basic header indicating the CD-ROM profile. */
|
952 |
outbuf[7] = 8; // CD-ROM |
953 |
buflen = 8;
|
954 |
break;
|
955 |
case SERVICE_ACTION_IN:
|
956 |
/* Service Action In subcommands. */
|
957 |
if ((req->cmd.buf[1] & 31) == 0x10) { |
958 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
959 |
memset(outbuf, 0, req->cmd.xfer);
|
960 |
bdrv_get_geometry(s->bs, &nb_sectors); |
961 |
if (!nb_sectors)
|
962 |
goto not_ready;
|
963 |
nb_sectors /= s->cluster_size; |
964 |
/* Returned value is the address of the last sector. */
|
965 |
nb_sectors--; |
966 |
/* Remember the new size for read/write sanity checking. */
|
967 |
s->max_lba = nb_sectors; |
968 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
969 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
970 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
971 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
972 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
973 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
974 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
975 |
outbuf[7] = nb_sectors & 0xff; |
976 |
outbuf[8] = 0; |
977 |
outbuf[9] = 0; |
978 |
outbuf[10] = s->cluster_size * 2; |
979 |
outbuf[11] = 0; |
980 |
outbuf[12] = 0; |
981 |
outbuf[13] = get_physical_block_exp(&s->qdev.conf);
|
982 |
|
983 |
/* set TPE bit if the format supports discard */
|
984 |
if (s->qdev.conf.discard_granularity) {
|
985 |
outbuf[14] = 0x80; |
986 |
} |
987 |
|
988 |
/* Protection, exponent and lowest lba field left blank. */
|
989 |
buflen = req->cmd.xfer; |
990 |
break;
|
991 |
} |
992 |
DPRINTF("Unsupported Service Action In\n");
|
993 |
goto illegal_request;
|
994 |
case REPORT_LUNS:
|
995 |
if (req->cmd.xfer < 16) |
996 |
goto illegal_request;
|
997 |
memset(outbuf, 0, 16); |
998 |
outbuf[3] = 8; |
999 |
buflen = 16;
|
1000 |
break;
|
1001 |
case VERIFY:
|
1002 |
break;
|
1003 |
case REZERO_UNIT:
|
1004 |
DPRINTF("Rezero Unit\n");
|
1005 |
if (!bdrv_is_inserted(s->bs)) {
|
1006 |
goto not_ready;
|
1007 |
} |
1008 |
break;
|
1009 |
default:
|
1010 |
goto illegal_request;
|
1011 |
} |
1012 |
scsi_req_set_status(r, GOOD, NO_SENSE); |
1013 |
return buflen;
|
1014 |
|
1015 |
not_ready:
|
1016 |
scsi_command_complete(r, CHECK_CONDITION, NOT_READY); |
1017 |
return -1; |
1018 |
|
1019 |
illegal_request:
|
1020 |
scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST); |
1021 |
return -1; |
1022 |
} |
1023 |
|
1024 |
/* Execute a scsi command. Returns the length of the data expected by the
|
1025 |
command. This will be Positive for data transfers from the device
|
1026 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
1027 |
and zero if the command does not transfer any data. */
|
1028 |
|
1029 |
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
|
1030 |
uint8_t *buf, int lun)
|
1031 |
{ |
1032 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
1033 |
uint32_t len; |
1034 |
int is_write;
|
1035 |
uint8_t command; |
1036 |
uint8_t *outbuf; |
1037 |
SCSIDiskReq *r; |
1038 |
int rc;
|
1039 |
|
1040 |
command = buf[0];
|
1041 |
r = scsi_find_request(s, tag); |
1042 |
if (r) {
|
1043 |
BADF("Tag 0x%x already in use\n", tag);
|
1044 |
scsi_cancel_io(d, tag); |
1045 |
} |
1046 |
/* ??? Tags are not unique for different luns. We only implement a
|
1047 |
single lun, so this should not matter. */
|
1048 |
r = scsi_new_request(s, tag, lun); |
1049 |
outbuf = (uint8_t *)r->iov.iov_base; |
1050 |
is_write = 0;
|
1051 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
1052 |
|
1053 |
if (scsi_req_parse(&r->req, buf) != 0) { |
1054 |
BADF("Unsupported command length, command %x\n", command);
|
1055 |
goto fail;
|
1056 |
} |
1057 |
#ifdef DEBUG_SCSI
|
1058 |
{ |
1059 |
int i;
|
1060 |
for (i = 1; i < r->req.cmd.len; i++) { |
1061 |
printf(" 0x%02x", buf[i]);
|
1062 |
} |
1063 |
printf("\n");
|
1064 |
} |
1065 |
#endif
|
1066 |
|
1067 |
if (lun || buf[1] >> 5) { |
1068 |
/* Only LUN 0 supported. */
|
1069 |
DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5); |
1070 |
if (command != REQUEST_SENSE && command != INQUIRY)
|
1071 |
goto fail;
|
1072 |
} |
1073 |
switch (command) {
|
1074 |
case TEST_UNIT_READY:
|
1075 |
case REQUEST_SENSE:
|
1076 |
case INQUIRY:
|
1077 |
case MODE_SENSE:
|
1078 |
case MODE_SENSE_10:
|
1079 |
case RESERVE:
|
1080 |
case RESERVE_10:
|
1081 |
case RELEASE:
|
1082 |
case RELEASE_10:
|
1083 |
case START_STOP:
|
1084 |
case ALLOW_MEDIUM_REMOVAL:
|
1085 |
case READ_CAPACITY:
|
1086 |
case SYNCHRONIZE_CACHE:
|
1087 |
case READ_TOC:
|
1088 |
case GET_CONFIGURATION:
|
1089 |
case SERVICE_ACTION_IN:
|
1090 |
case REPORT_LUNS:
|
1091 |
case VERIFY:
|
1092 |
case REZERO_UNIT:
|
1093 |
rc = scsi_disk_emulate_command(r, outbuf); |
1094 |
if (rc < 0) { |
1095 |
return 0; |
1096 |
} |
1097 |
|
1098 |
r->iov.iov_len = rc; |
1099 |
break;
|
1100 |
case READ_6:
|
1101 |
case READ_10:
|
1102 |
case READ_12:
|
1103 |
case READ_16:
|
1104 |
len = r->req.cmd.xfer / d->blocksize; |
1105 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", r->req.cmd.lba, len); |
1106 |
if (r->req.cmd.lba > s->max_lba)
|
1107 |
goto illegal_lba;
|
1108 |
r->sector = r->req.cmd.lba * s->cluster_size; |
1109 |
r->sector_count = len * s->cluster_size; |
1110 |
break;
|
1111 |
case WRITE_6:
|
1112 |
case WRITE_10:
|
1113 |
case WRITE_12:
|
1114 |
case WRITE_16:
|
1115 |
case WRITE_VERIFY:
|
1116 |
case WRITE_VERIFY_12:
|
1117 |
case WRITE_VERIFY_16:
|
1118 |
len = r->req.cmd.xfer / d->blocksize; |
1119 |
DPRINTF("Write %s(sector %" PRId64 ", count %d)\n", |
1120 |
(command & 0xe) == 0xe ? "And Verify " : "", |
1121 |
r->req.cmd.lba, len); |
1122 |
if (r->req.cmd.lba > s->max_lba)
|
1123 |
goto illegal_lba;
|
1124 |
r->sector = r->req.cmd.lba * s->cluster_size; |
1125 |
r->sector_count = len * s->cluster_size; |
1126 |
is_write = 1;
|
1127 |
break;
|
1128 |
case MODE_SELECT:
|
1129 |
DPRINTF("Mode Select(6) (len %lu)\n", (long)r->req.cmd.xfer); |
1130 |
/* We don't support mode parameter changes.
|
1131 |
Allow the mode parameter header + block descriptors only. */
|
1132 |
if (r->req.cmd.xfer > 12) { |
1133 |
goto fail;
|
1134 |
} |
1135 |
break;
|
1136 |
case MODE_SELECT_10:
|
1137 |
DPRINTF("Mode Select(10) (len %lu)\n", (long)r->req.cmd.xfer); |
1138 |
/* We don't support mode parameter changes.
|
1139 |
Allow the mode parameter header + block descriptors only. */
|
1140 |
if (r->req.cmd.xfer > 16) { |
1141 |
goto fail;
|
1142 |
} |
1143 |
break;
|
1144 |
case SEEK_6:
|
1145 |
case SEEK_10:
|
1146 |
DPRINTF("Seek(%d) (sector %" PRId64 ")\n", command == SEEK_6 ? 6 : 10, |
1147 |
r->req.cmd.lba); |
1148 |
if (r->req.cmd.lba > s->max_lba) {
|
1149 |
goto illegal_lba;
|
1150 |
} |
1151 |
break;
|
1152 |
case WRITE_SAME_16:
|
1153 |
len = r->req.cmd.xfer / d->blocksize; |
1154 |
|
1155 |
DPRINTF("WRITE SAME(16) (sector %" PRId64 ", count %d)\n", |
1156 |
r->req.cmd.lba, len); |
1157 |
|
1158 |
if (r->req.cmd.lba > s->max_lba) {
|
1159 |
goto illegal_lba;
|
1160 |
} |
1161 |
|
1162 |
/*
|
1163 |
* We only support WRITE SAME with the unmap bit set for now.
|
1164 |
*/
|
1165 |
if (!(buf[1] & 0x8)) { |
1166 |
goto fail;
|
1167 |
} |
1168 |
|
1169 |
rc = bdrv_discard(s->bs, r->req.cmd.lba * s->cluster_size, |
1170 |
len * s->cluster_size); |
1171 |
if (rc < 0) { |
1172 |
/* XXX: better error code ?*/
|
1173 |
goto fail;
|
1174 |
} |
1175 |
|
1176 |
break;
|
1177 |
default:
|
1178 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
1179 |
fail:
|
1180 |
scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST); |
1181 |
return 0; |
1182 |
illegal_lba:
|
1183 |
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
1184 |
return 0; |
1185 |
} |
1186 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
1187 |
scsi_command_complete(r, GOOD, NO_SENSE); |
1188 |
} |
1189 |
len = r->sector_count * 512 + r->iov.iov_len;
|
1190 |
if (is_write) {
|
1191 |
return -len;
|
1192 |
} else {
|
1193 |
if (!r->sector_count)
|
1194 |
r->sector_count = -1;
|
1195 |
return len;
|
1196 |
} |
1197 |
} |
1198 |
|
1199 |
static void scsi_disk_purge_requests(SCSIDiskState *s) |
1200 |
{ |
1201 |
SCSIDiskReq *r; |
1202 |
|
1203 |
while (!QTAILQ_EMPTY(&s->qdev.requests)) {
|
1204 |
r = DO_UPCAST(SCSIDiskReq, req, QTAILQ_FIRST(&s->qdev.requests)); |
1205 |
if (r->req.aiocb) {
|
1206 |
bdrv_aio_cancel(r->req.aiocb); |
1207 |
} |
1208 |
scsi_remove_request(r); |
1209 |
} |
1210 |
} |
1211 |
|
1212 |
static void scsi_disk_reset(DeviceState *dev) |
1213 |
{ |
1214 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); |
1215 |
uint64_t nb_sectors; |
1216 |
|
1217 |
scsi_disk_purge_requests(s); |
1218 |
|
1219 |
bdrv_get_geometry(s->bs, &nb_sectors); |
1220 |
nb_sectors /= s->cluster_size; |
1221 |
if (nb_sectors) {
|
1222 |
nb_sectors--; |
1223 |
} |
1224 |
s->max_lba = nb_sectors; |
1225 |
} |
1226 |
|
1227 |
static void scsi_destroy(SCSIDevice *dev) |
1228 |
{ |
1229 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1230 |
|
1231 |
scsi_disk_purge_requests(s); |
1232 |
blockdev_mark_auto_del(s->qdev.conf.bs); |
1233 |
} |
1234 |
|
1235 |
static int scsi_disk_initfn(SCSIDevice *dev) |
1236 |
{ |
1237 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
1238 |
int is_cd;
|
1239 |
DriveInfo *dinfo; |
1240 |
|
1241 |
if (!s->qdev.conf.bs) {
|
1242 |
error_report("scsi-disk: drive property not set");
|
1243 |
return -1; |
1244 |
} |
1245 |
s->bs = s->qdev.conf.bs; |
1246 |
is_cd = bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM; |
1247 |
|
1248 |
if (!is_cd && !bdrv_is_inserted(s->bs)) {
|
1249 |
error_report("Device needs media, but drive is empty");
|
1250 |
return -1; |
1251 |
} |
1252 |
|
1253 |
if (!s->serial) {
|
1254 |
/* try to fall back to value set with legacy -drive serial=... */
|
1255 |
dinfo = drive_get_by_blockdev(s->bs); |
1256 |
s->serial = qemu_strdup(*dinfo->serial ? dinfo->serial : "0");
|
1257 |
} |
1258 |
|
1259 |
if (!s->version) {
|
1260 |
s->version = qemu_strdup(QEMU_VERSION); |
1261 |
} |
1262 |
|
1263 |
if (bdrv_is_sg(s->bs)) {
|
1264 |
error_report("scsi-disk: unwanted /dev/sg*");
|
1265 |
return -1; |
1266 |
} |
1267 |
|
1268 |
if (is_cd) {
|
1269 |
s->qdev.blocksize = 2048;
|
1270 |
} else {
|
1271 |
s->qdev.blocksize = s->qdev.conf.logical_block_size; |
1272 |
} |
1273 |
s->cluster_size = s->qdev.blocksize / 512;
|
1274 |
s->bs->buffer_alignment = s->qdev.blocksize; |
1275 |
|
1276 |
s->qdev.type = TYPE_DISK; |
1277 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
1278 |
bdrv_set_removable(s->bs, is_cd); |
1279 |
add_boot_device_path(s->qdev.conf.bootindex, &dev->qdev, ",0");
|
1280 |
return 0; |
1281 |
} |
1282 |
|
1283 |
static SCSIDeviceInfo scsi_disk_info = {
|
1284 |
.qdev.name = "scsi-disk",
|
1285 |
.qdev.fw_name = "disk",
|
1286 |
.qdev.desc = "virtual scsi disk or cdrom",
|
1287 |
.qdev.size = sizeof(SCSIDiskState),
|
1288 |
.qdev.reset = scsi_disk_reset, |
1289 |
.init = scsi_disk_initfn, |
1290 |
.destroy = scsi_destroy, |
1291 |
.send_command = scsi_send_command, |
1292 |
.read_data = scsi_read_data, |
1293 |
.write_data = scsi_write_data, |
1294 |
.cancel_io = scsi_cancel_io, |
1295 |
.get_buf = scsi_get_buf, |
1296 |
.qdev.props = (Property[]) { |
1297 |
DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), |
1298 |
DEFINE_PROP_STRING("ver", SCSIDiskState, version),
|
1299 |
DEFINE_PROP_STRING("serial", SCSIDiskState, serial),
|
1300 |
DEFINE_PROP_BIT("removable", SCSIDiskState, removable, 0, false), |
1301 |
DEFINE_PROP_END_OF_LIST(), |
1302 |
}, |
1303 |
}; |
1304 |
|
1305 |
static void scsi_disk_register_devices(void) |
1306 |
{ |
1307 |
scsi_qdev_register(&scsi_disk_info); |
1308 |
} |
1309 |
device_init(scsi_disk_register_devices) |