root / hw / scsi-disk.c @ 3f4cb3d3
History | View | Annotate | Download (30.9 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 |
*
|
| 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, args...) \
|
| 22 |
do { printf("scsi-disk: " fmt , ##args); } while (0) |
| 23 |
#else
|
| 24 |
#define DPRINTF(fmt, args...) do {} while(0) |
| 25 |
#endif
|
| 26 |
|
| 27 |
#define BADF(fmt, args...) \
|
| 28 |
do { fprintf(stderr, "scsi-disk: " fmt , ##args); } while (0) |
| 29 |
|
| 30 |
#include "qemu-common.h" |
| 31 |
#include "block.h" |
| 32 |
#include "scsi-disk.h" |
| 33 |
|
| 34 |
#define SENSE_NO_SENSE 0 |
| 35 |
#define SENSE_NOT_READY 2 |
| 36 |
#define SENSE_HARDWARE_ERROR 4 |
| 37 |
#define SENSE_ILLEGAL_REQUEST 5 |
| 38 |
|
| 39 |
#define STATUS_GOOD 0 |
| 40 |
#define STATUS_CHECK_CONDITION 2 |
| 41 |
|
| 42 |
#define SCSI_DMA_BUF_SIZE 131072 |
| 43 |
#define SCSI_MAX_INQUIRY_LEN 256 |
| 44 |
|
| 45 |
#define SCSI_REQ_STATUS_RETRY 0x01 |
| 46 |
|
| 47 |
typedef struct SCSIRequest { |
| 48 |
SCSIDeviceState *dev; |
| 49 |
uint32_t tag; |
| 50 |
/* ??? We should probably keep track of whether the data transfer is
|
| 51 |
a read or a write. Currently we rely on the host getting it right. */
|
| 52 |
/* Both sector and sector_count are in terms of qemu 512 byte blocks. */
|
| 53 |
uint64_t sector; |
| 54 |
uint32_t sector_count; |
| 55 |
struct iovec iov;
|
| 56 |
QEMUIOVector qiov; |
| 57 |
BlockDriverAIOCB *aiocb; |
| 58 |
struct SCSIRequest *next;
|
| 59 |
uint32_t status; |
| 60 |
} SCSIRequest; |
| 61 |
|
| 62 |
struct SCSIDeviceState
|
| 63 |
{
|
| 64 |
BlockDriverState *bdrv; |
| 65 |
SCSIRequest *requests; |
| 66 |
/* The qemu block layer uses a fixed 512 byte sector size.
|
| 67 |
This is the number of 512 byte blocks in a single scsi sector. */
|
| 68 |
int cluster_size;
|
| 69 |
uint64_t max_lba; |
| 70 |
int sense;
|
| 71 |
int tcq;
|
| 72 |
/* Completion functions may be called from either scsi_{read,write}_data
|
| 73 |
or from the AIO completion routines. */
|
| 74 |
scsi_completionfn completion; |
| 75 |
void *opaque;
|
| 76 |
char drive_serial_str[21]; |
| 77 |
}; |
| 78 |
|
| 79 |
/* Global pool of SCSIRequest structures. */
|
| 80 |
static SCSIRequest *free_requests = NULL; |
| 81 |
|
| 82 |
static SCSIRequest *scsi_new_request(SCSIDeviceState *s, uint32_t tag)
|
| 83 |
{
|
| 84 |
SCSIRequest *r; |
| 85 |
|
| 86 |
if (free_requests) {
|
| 87 |
r = free_requests; |
| 88 |
free_requests = r->next; |
| 89 |
} else {
|
| 90 |
r = qemu_malloc(sizeof(SCSIRequest));
|
| 91 |
r->iov.iov_base = qemu_memalign(512, SCSI_DMA_BUF_SIZE);
|
| 92 |
} |
| 93 |
r->dev = s; |
| 94 |
r->tag = tag; |
| 95 |
r->sector_count = 0;
|
| 96 |
r->iov.iov_len = 0;
|
| 97 |
r->aiocb = NULL;
|
| 98 |
r->status = 0;
|
| 99 |
|
| 100 |
r->next = s->requests; |
| 101 |
s->requests = r; |
| 102 |
return r;
|
| 103 |
} |
| 104 |
|
| 105 |
static void scsi_remove_request(SCSIRequest *r) |
| 106 |
{
|
| 107 |
SCSIRequest *last; |
| 108 |
SCSIDeviceState *s = r->dev; |
| 109 |
|
| 110 |
if (s->requests == r) {
|
| 111 |
s->requests = r->next; |
| 112 |
} else {
|
| 113 |
last = s->requests; |
| 114 |
while (last && last->next != r)
|
| 115 |
last = last->next; |
| 116 |
if (last) {
|
| 117 |
last->next = r->next; |
| 118 |
} else {
|
| 119 |
BADF("Orphaned request\n");
|
| 120 |
} |
| 121 |
} |
| 122 |
r->next = free_requests; |
| 123 |
free_requests = r; |
| 124 |
} |
| 125 |
|
| 126 |
static SCSIRequest *scsi_find_request(SCSIDeviceState *s, uint32_t tag)
|
| 127 |
{
|
| 128 |
SCSIRequest *r; |
| 129 |
|
| 130 |
r = s->requests; |
| 131 |
while (r && r->tag != tag)
|
| 132 |
r = r->next; |
| 133 |
|
| 134 |
return r;
|
| 135 |
} |
| 136 |
|
| 137 |
/* Helper function for command completion. */
|
| 138 |
static void scsi_command_complete(SCSIRequest *r, int status, int sense) |
| 139 |
{
|
| 140 |
SCSIDeviceState *s = r->dev; |
| 141 |
uint32_t tag; |
| 142 |
DPRINTF("Command complete tag=0x%x status=%d sense=%d\n", r->tag, status, sense);
|
| 143 |
s->sense = sense; |
| 144 |
tag = r->tag; |
| 145 |
scsi_remove_request(r); |
| 146 |
s->completion(s->opaque, SCSI_REASON_DONE, tag, status); |
| 147 |
} |
| 148 |
|
| 149 |
/* Cancel a pending data transfer. */
|
| 150 |
static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) |
| 151 |
{
|
| 152 |
SCSIDeviceState *s = d->state; |
| 153 |
SCSIRequest *r; |
| 154 |
DPRINTF("Cancel tag=0x%x\n", tag);
|
| 155 |
r = scsi_find_request(s, tag); |
| 156 |
if (r) {
|
| 157 |
if (r->aiocb)
|
| 158 |
bdrv_aio_cancel(r->aiocb); |
| 159 |
r->aiocb = NULL;
|
| 160 |
scsi_remove_request(r); |
| 161 |
} |
| 162 |
} |
| 163 |
|
| 164 |
static void scsi_read_complete(void * opaque, int ret) |
| 165 |
{
|
| 166 |
SCSIRequest *r = (SCSIRequest *)opaque; |
| 167 |
SCSIDeviceState *s = r->dev; |
| 168 |
|
| 169 |
if (ret) {
|
| 170 |
DPRINTF("IO error\n");
|
| 171 |
s->completion(s->opaque, SCSI_REASON_DATA, r->tag, 0);
|
| 172 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NO_SENSE); |
| 173 |
return;
|
| 174 |
} |
| 175 |
DPRINTF("Data ready tag=0x%x len=%d\n", r->tag, r->iov.iov_len);
|
| 176 |
|
| 177 |
s->completion(s->opaque, SCSI_REASON_DATA, r->tag, r->iov.iov_len); |
| 178 |
} |
| 179 |
|
| 180 |
/* Read more data from scsi device into buffer. */
|
| 181 |
static void scsi_read_data(SCSIDevice *d, uint32_t tag) |
| 182 |
{
|
| 183 |
SCSIDeviceState *s = d->state; |
| 184 |
SCSIRequest *r; |
| 185 |
uint32_t n; |
| 186 |
|
| 187 |
r = scsi_find_request(s, tag); |
| 188 |
if (!r) {
|
| 189 |
BADF("Bad read tag 0x%x\n", tag);
|
| 190 |
/* ??? This is the wrong error. */
|
| 191 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR); |
| 192 |
return;
|
| 193 |
} |
| 194 |
if (r->sector_count == (uint32_t)-1) { |
| 195 |
DPRINTF("Read buf_len=%d\n", r->iov.iov_len);
|
| 196 |
r->sector_count = 0;
|
| 197 |
s->completion(s->opaque, SCSI_REASON_DATA, r->tag, r->iov.iov_len); |
| 198 |
return;
|
| 199 |
} |
| 200 |
DPRINTF("Read sector_count=%d\n", r->sector_count);
|
| 201 |
if (r->sector_count == 0) { |
| 202 |
scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE); |
| 203 |
return;
|
| 204 |
} |
| 205 |
|
| 206 |
n = r->sector_count; |
| 207 |
if (n > SCSI_DMA_BUF_SIZE / 512) |
| 208 |
n = SCSI_DMA_BUF_SIZE / 512;
|
| 209 |
|
| 210 |
r->iov.iov_len = n * 512;
|
| 211 |
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
|
| 212 |
r->aiocb = bdrv_aio_readv(s->bdrv, r->sector, &r->qiov, n, |
| 213 |
scsi_read_complete, r); |
| 214 |
if (r->aiocb == NULL) |
| 215 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR); |
| 216 |
r->sector += n; |
| 217 |
r->sector_count -= n; |
| 218 |
} |
| 219 |
|
| 220 |
static int scsi_handle_write_error(SCSIRequest *r, int error) |
| 221 |
{
|
| 222 |
BlockInterfaceErrorAction action = drive_get_onerror(r->dev->bdrv); |
| 223 |
|
| 224 |
if (action == BLOCK_ERR_IGNORE)
|
| 225 |
return 0; |
| 226 |
|
| 227 |
if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC)
|
| 228 |
|| action == BLOCK_ERR_STOP_ANY) {
|
| 229 |
r->status |= SCSI_REQ_STATUS_RETRY; |
| 230 |
vm_stop(0);
|
| 231 |
} else {
|
| 232 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, |
| 233 |
SENSE_HARDWARE_ERROR); |
| 234 |
} |
| 235 |
|
| 236 |
return 1; |
| 237 |
} |
| 238 |
|
| 239 |
static void scsi_write_complete(void * opaque, int ret) |
| 240 |
{
|
| 241 |
SCSIRequest *r = (SCSIRequest *)opaque; |
| 242 |
SCSIDeviceState *s = r->dev; |
| 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 |
s->completion(s->opaque, SCSI_REASON_DATA, r->tag, len); |
| 266 |
} |
| 267 |
} |
| 268 |
|
| 269 |
static void scsi_write_request(SCSIRequest *r) |
| 270 |
{
|
| 271 |
SCSIDeviceState *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->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 |
SCSIDeviceState *s = d->state; |
| 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_cb(void *opaque, int running, int reason) |
| 312 |
{
|
| 313 |
SCSIDeviceState *s = opaque; |
| 314 |
SCSIRequest *r = s->requests; |
| 315 |
if (!running)
|
| 316 |
return;
|
| 317 |
|
| 318 |
while (r) {
|
| 319 |
if (r->status & SCSI_REQ_STATUS_RETRY) {
|
| 320 |
r->status &= ~SCSI_REQ_STATUS_RETRY; |
| 321 |
scsi_write_request(r); |
| 322 |
} |
| 323 |
r = r->next; |
| 324 |
} |
| 325 |
} |
| 326 |
|
| 327 |
/* Return a pointer to the data buffer. */
|
| 328 |
static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
|
| 329 |
{
|
| 330 |
SCSIDeviceState *s = d->state; |
| 331 |
SCSIRequest *r; |
| 332 |
|
| 333 |
r = scsi_find_request(s, tag); |
| 334 |
if (!r) {
|
| 335 |
BADF("Bad buffer tag 0x%x\n", tag);
|
| 336 |
return NULL; |
| 337 |
} |
| 338 |
return (uint8_t *)r->iov.iov_base;
|
| 339 |
} |
| 340 |
|
| 341 |
/* Execute a scsi command. Returns the length of the data expected by the
|
| 342 |
command. This will be Positive for data transfers from the device
|
| 343 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
| 344 |
and zero if the command does not transfer any data. */
|
| 345 |
|
| 346 |
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
|
| 347 |
uint8_t *buf, int lun)
|
| 348 |
{
|
| 349 |
SCSIDeviceState *s = d->state; |
| 350 |
uint64_t nb_sectors; |
| 351 |
uint64_t lba; |
| 352 |
uint32_t len; |
| 353 |
int cmdlen;
|
| 354 |
int is_write;
|
| 355 |
uint8_t command; |
| 356 |
uint8_t *outbuf; |
| 357 |
SCSIRequest *r; |
| 358 |
|
| 359 |
command = buf[0];
|
| 360 |
r = scsi_find_request(s, tag); |
| 361 |
if (r) {
|
| 362 |
BADF("Tag 0x%x already in use\n", tag);
|
| 363 |
scsi_cancel_io(d, tag); |
| 364 |
} |
| 365 |
/* ??? Tags are not unique for different luns. We only implement a
|
| 366 |
single lun, so this should not matter. */
|
| 367 |
r = scsi_new_request(s, tag); |
| 368 |
outbuf = (uint8_t *)r->iov.iov_base; |
| 369 |
is_write = 0;
|
| 370 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
| 371 |
switch (command >> 5) { |
| 372 |
case 0: |
| 373 |
lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) | |
| 374 |
(((uint64_t) buf[1] & 0x1f) << 16); |
| 375 |
len = buf[4];
|
| 376 |
cmdlen = 6;
|
| 377 |
break;
|
| 378 |
case 1: |
| 379 |
case 2: |
| 380 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
| 381 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
| 382 |
len = buf[8] | (buf[7] << 8); |
| 383 |
cmdlen = 10;
|
| 384 |
break;
|
| 385 |
case 4: |
| 386 |
lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) | |
| 387 |
((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) | |
| 388 |
((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) | |
| 389 |
((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56); |
| 390 |
len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24); |
| 391 |
cmdlen = 16;
|
| 392 |
break;
|
| 393 |
case 5: |
| 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[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24); |
| 397 |
cmdlen = 12;
|
| 398 |
break;
|
| 399 |
default:
|
| 400 |
BADF("Unsupported command length, command %x\n", command);
|
| 401 |
goto fail;
|
| 402 |
} |
| 403 |
#ifdef DEBUG_SCSI
|
| 404 |
{
|
| 405 |
int i;
|
| 406 |
for (i = 1; i < cmdlen; i++) { |
| 407 |
printf(" 0x%02x", buf[i]);
|
| 408 |
} |
| 409 |
printf("\n");
|
| 410 |
} |
| 411 |
#endif
|
| 412 |
if (lun || buf[1] >> 5) { |
| 413 |
/* Only LUN 0 supported. */
|
| 414 |
DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5); |
| 415 |
if (command != 0x03 && command != 0x12) /* REQUEST SENSE and INQUIRY */ |
| 416 |
goto fail;
|
| 417 |
} |
| 418 |
switch (command) {
|
| 419 |
case 0x0: |
| 420 |
DPRINTF("Test Unit Ready\n");
|
| 421 |
if (!bdrv_is_inserted(s->bdrv))
|
| 422 |
goto notready;
|
| 423 |
break;
|
| 424 |
case 0x03: |
| 425 |
DPRINTF("Request Sense (len %d)\n", len);
|
| 426 |
if (len < 4) |
| 427 |
goto fail;
|
| 428 |
memset(outbuf, 0, 4); |
| 429 |
r->iov.iov_len = 4;
|
| 430 |
if (s->sense == SENSE_NOT_READY && len >= 18) { |
| 431 |
memset(outbuf, 0, 18); |
| 432 |
r->iov.iov_len = 18;
|
| 433 |
outbuf[7] = 10; |
| 434 |
/* asc 0x3a, ascq 0: Medium not present */
|
| 435 |
outbuf[12] = 0x3a; |
| 436 |
outbuf[13] = 0; |
| 437 |
} |
| 438 |
outbuf[0] = 0xf0; |
| 439 |
outbuf[1] = 0; |
| 440 |
outbuf[2] = s->sense;
|
| 441 |
break;
|
| 442 |
case 0x12: |
| 443 |
DPRINTF("Inquiry (len %d)\n", len);
|
| 444 |
if (buf[1] & 0x2) { |
| 445 |
/* Command support data - optional, not implemented */
|
| 446 |
BADF("optional INQUIRY command support request not implemented\n");
|
| 447 |
goto fail;
|
| 448 |
} |
| 449 |
else if (buf[1] & 0x1) { |
| 450 |
/* Vital product data */
|
| 451 |
uint8_t page_code = buf[2];
|
| 452 |
if (len < 4) { |
| 453 |
BADF("Error: Inquiry (EVPD[%02X]) buffer size %d is "
|
| 454 |
"less than 4\n", page_code, len);
|
| 455 |
goto fail;
|
| 456 |
} |
| 457 |
|
| 458 |
switch (page_code) {
|
| 459 |
case 0x00: |
| 460 |
{
|
| 461 |
/* Supported page codes, mandatory */
|
| 462 |
DPRINTF("Inquiry EVPD[Supported pages] "
|
| 463 |
"buffer size %d\n", len);
|
| 464 |
|
| 465 |
r->iov.iov_len = 0;
|
| 466 |
|
| 467 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
| 468 |
outbuf[r->iov.iov_len++] = 5;
|
| 469 |
} else {
|
| 470 |
outbuf[r->iov.iov_len++] = 0;
|
| 471 |
} |
| 472 |
|
| 473 |
outbuf[r->iov.iov_len++] = 0x00; // this page |
| 474 |
outbuf[r->iov.iov_len++] = 0x00;
|
| 475 |
outbuf[r->iov.iov_len++] = 3; // number of pages |
| 476 |
outbuf[r->iov.iov_len++] = 0x00; // list of supported pages (this page) |
| 477 |
outbuf[r->iov.iov_len++] = 0x80; // unit serial number |
| 478 |
outbuf[r->iov.iov_len++] = 0x83; // device identification |
| 479 |
} |
| 480 |
break;
|
| 481 |
case 0x80: |
| 482 |
{
|
| 483 |
int l;
|
| 484 |
|
| 485 |
/* Device serial number, optional */
|
| 486 |
if (len < 4) { |
| 487 |
BADF("Error: EVPD[Serial number] Inquiry buffer "
|
| 488 |
"size %d too small, %d needed\n", len, 4); |
| 489 |
goto fail;
|
| 490 |
} |
| 491 |
|
| 492 |
DPRINTF("Inquiry EVPD[Serial number] buffer size %d\n", len);
|
| 493 |
l = MIN(len, strlen(s->drive_serial_str)); |
| 494 |
|
| 495 |
r->iov.iov_len = 0;
|
| 496 |
|
| 497 |
/* Supported page codes */
|
| 498 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
| 499 |
outbuf[r->iov.iov_len++] = 5;
|
| 500 |
} else {
|
| 501 |
outbuf[r->iov.iov_len++] = 0;
|
| 502 |
} |
| 503 |
|
| 504 |
outbuf[r->iov.iov_len++] = 0x80; // this page |
| 505 |
outbuf[r->iov.iov_len++] = 0x00;
|
| 506 |
outbuf[r->iov.iov_len++] = l; |
| 507 |
memcpy(&outbuf[r->iov.iov_len], s->drive_serial_str, l); |
| 508 |
r->iov.iov_len += l; |
| 509 |
} |
| 510 |
|
| 511 |
break;
|
| 512 |
case 0x83: |
| 513 |
{
|
| 514 |
/* Device identification page, mandatory */
|
| 515 |
int max_len = 255 - 8; |
| 516 |
int id_len = strlen(bdrv_get_device_name(s->bdrv));
|
| 517 |
if (id_len > max_len)
|
| 518 |
id_len = max_len; |
| 519 |
|
| 520 |
DPRINTF("Inquiry EVPD[Device identification] "
|
| 521 |
"buffer size %d\n", len);
|
| 522 |
r->iov.iov_len = 0;
|
| 523 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
| 524 |
outbuf[r->iov.iov_len++] = 5;
|
| 525 |
} else {
|
| 526 |
outbuf[r->iov.iov_len++] = 0;
|
| 527 |
} |
| 528 |
|
| 529 |
outbuf[r->iov.iov_len++] = 0x83; // this page |
| 530 |
outbuf[r->iov.iov_len++] = 0x00;
|
| 531 |
outbuf[r->iov.iov_len++] = 3 + id_len;
|
| 532 |
|
| 533 |
outbuf[r->iov.iov_len++] = 0x2; // ASCII |
| 534 |
outbuf[r->iov.iov_len++] = 0; // not officially assigned |
| 535 |
outbuf[r->iov.iov_len++] = 0; // reserved |
| 536 |
outbuf[r->iov.iov_len++] = id_len; // length of data following
|
| 537 |
|
| 538 |
memcpy(&outbuf[r->iov.iov_len], |
| 539 |
bdrv_get_device_name(s->bdrv), id_len); |
| 540 |
r->iov.iov_len += id_len; |
| 541 |
} |
| 542 |
break;
|
| 543 |
default:
|
| 544 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
| 545 |
"buffer size %d\n", page_code, len);
|
| 546 |
goto fail;
|
| 547 |
} |
| 548 |
/* done with EVPD */
|
| 549 |
break;
|
| 550 |
} |
| 551 |
else {
|
| 552 |
/* Standard INQUIRY data */
|
| 553 |
if (buf[2] != 0) { |
| 554 |
BADF("Error: Inquiry (STANDARD) page or code "
|
| 555 |
"is non-zero [%02X]\n", buf[2]); |
| 556 |
goto fail;
|
| 557 |
} |
| 558 |
|
| 559 |
/* PAGE CODE == 0 */
|
| 560 |
if (len < 5) { |
| 561 |
BADF("Error: Inquiry (STANDARD) buffer size %d "
|
| 562 |
"is less than 5\n", len);
|
| 563 |
goto fail;
|
| 564 |
} |
| 565 |
|
| 566 |
if (len < 36) { |
| 567 |
BADF("Error: Inquiry (STANDARD) buffer size %d "
|
| 568 |
"is less than 36 (TODO: only 5 required)\n", len);
|
| 569 |
} |
| 570 |
} |
| 571 |
|
| 572 |
if(len > SCSI_MAX_INQUIRY_LEN)
|
| 573 |
len = SCSI_MAX_INQUIRY_LEN; |
| 574 |
|
| 575 |
memset(outbuf, 0, len);
|
| 576 |
|
| 577 |
if (lun || buf[1] >> 5) { |
| 578 |
outbuf[0] = 0x7f; /* LUN not supported */ |
| 579 |
} else if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) { |
| 580 |
outbuf[0] = 5; |
| 581 |
outbuf[1] = 0x80; |
| 582 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
| 583 |
} else {
|
| 584 |
outbuf[0] = 0; |
| 585 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
| 586 |
} |
| 587 |
memcpy(&outbuf[8], "QEMU ", 8); |
| 588 |
memcpy(&outbuf[32], QEMU_VERSION, 4); |
| 589 |
/* Identify device as SCSI-3 rev 1.
|
| 590 |
Some later commands are also implemented. */
|
| 591 |
outbuf[2] = 3; |
| 592 |
outbuf[3] = 2; /* Format 2 */ |
| 593 |
outbuf[4] = len - 5; /* Additional Length = (Len - 1) - 4 */ |
| 594 |
/* Sync data transfer and TCQ. */
|
| 595 |
outbuf[7] = 0x10 | (s->tcq ? 0x02 : 0); |
| 596 |
r->iov.iov_len = len; |
| 597 |
break;
|
| 598 |
case 0x16: |
| 599 |
DPRINTF("Reserve(6)\n");
|
| 600 |
if (buf[1] & 1) |
| 601 |
goto fail;
|
| 602 |
break;
|
| 603 |
case 0x17: |
| 604 |
DPRINTF("Release(6)\n");
|
| 605 |
if (buf[1] & 1) |
| 606 |
goto fail;
|
| 607 |
break;
|
| 608 |
case 0x1a: |
| 609 |
case 0x5a: |
| 610 |
{
|
| 611 |
uint8_t *p; |
| 612 |
int page;
|
| 613 |
|
| 614 |
page = buf[2] & 0x3f; |
| 615 |
DPRINTF("Mode Sense (page %d, len %d)\n", page, len);
|
| 616 |
p = outbuf; |
| 617 |
memset(p, 0, 4); |
| 618 |
outbuf[1] = 0; /* Default media type. */ |
| 619 |
outbuf[3] = 0; /* Block descriptor length. */ |
| 620 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
| 621 |
outbuf[2] = 0x80; /* Readonly. */ |
| 622 |
} |
| 623 |
p += 4;
|
| 624 |
if (page == 4) { |
| 625 |
int cylinders, heads, secs;
|
| 626 |
|
| 627 |
/* Rigid disk device geometry page. */
|
| 628 |
p[0] = 4; |
| 629 |
p[1] = 0x16; |
| 630 |
/* if a geometry hint is available, use it */
|
| 631 |
bdrv_get_geometry_hint(s->bdrv, &cylinders, &heads, &secs); |
| 632 |
p[2] = (cylinders >> 16) & 0xff; |
| 633 |
p[3] = (cylinders >> 8) & 0xff; |
| 634 |
p[4] = cylinders & 0xff; |
| 635 |
p[5] = heads & 0xff; |
| 636 |
/* Write precomp start cylinder, disabled */
|
| 637 |
p[6] = (cylinders >> 16) & 0xff; |
| 638 |
p[7] = (cylinders >> 8) & 0xff; |
| 639 |
p[8] = cylinders & 0xff; |
| 640 |
/* Reduced current start cylinder, disabled */
|
| 641 |
p[9] = (cylinders >> 16) & 0xff; |
| 642 |
p[10] = (cylinders >> 8) & 0xff; |
| 643 |
p[11] = cylinders & 0xff; |
| 644 |
/* Device step rate [ns], 200ns */
|
| 645 |
p[12] = 0; |
| 646 |
p[13] = 200; |
| 647 |
/* Landing zone cylinder */
|
| 648 |
p[14] = 0xff; |
| 649 |
p[15] = 0xff; |
| 650 |
p[16] = 0xff; |
| 651 |
/* Medium rotation rate [rpm], 5400 rpm */
|
| 652 |
p[20] = (5400 >> 8) & 0xff; |
| 653 |
p[21] = 5400 & 0xff; |
| 654 |
p += 0x16;
|
| 655 |
} else if (page == 5) { |
| 656 |
int cylinders, heads, secs;
|
| 657 |
|
| 658 |
/* Flexible disk device geometry page. */
|
| 659 |
p[0] = 5; |
| 660 |
p[1] = 0x1e; |
| 661 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
| 662 |
p[2] = 5000 >> 8; |
| 663 |
p[3] = 5000 & 0xff; |
| 664 |
/* if a geometry hint is available, use it */
|
| 665 |
bdrv_get_geometry_hint(s->bdrv, &cylinders, &heads, &secs); |
| 666 |
p[4] = heads & 0xff; |
| 667 |
p[5] = secs & 0xff; |
| 668 |
p[6] = s->cluster_size * 2; |
| 669 |
p[8] = (cylinders >> 8) & 0xff; |
| 670 |
p[9] = cylinders & 0xff; |
| 671 |
/* Write precomp start cylinder, disabled */
|
| 672 |
p[10] = (cylinders >> 8) & 0xff; |
| 673 |
p[11] = cylinders & 0xff; |
| 674 |
/* Reduced current start cylinder, disabled */
|
| 675 |
p[12] = (cylinders >> 8) & 0xff; |
| 676 |
p[13] = cylinders & 0xff; |
| 677 |
/* Device step rate [100us], 100us */
|
| 678 |
p[14] = 0; |
| 679 |
p[15] = 1; |
| 680 |
/* Device step pulse width [us], 1us */
|
| 681 |
p[16] = 1; |
| 682 |
/* Device head settle delay [100us], 100us */
|
| 683 |
p[17] = 0; |
| 684 |
p[18] = 1; |
| 685 |
/* Motor on delay [0.1s], 0.1s */
|
| 686 |
p[19] = 1; |
| 687 |
/* Motor off delay [0.1s], 0.1s */
|
| 688 |
p[20] = 1; |
| 689 |
/* Medium rotation rate [rpm], 5400 rpm */
|
| 690 |
p[28] = (5400 >> 8) & 0xff; |
| 691 |
p[29] = 5400 & 0xff; |
| 692 |
p += 0x1e;
|
| 693 |
} else if ((page == 8 || page == 0x3f)) { |
| 694 |
/* Caching page. */
|
| 695 |
memset(p,0,20); |
| 696 |
p[0] = 8; |
| 697 |
p[1] = 0x12; |
| 698 |
p[2] = 4; /* WCE */ |
| 699 |
p += 20;
|
| 700 |
} |
| 701 |
if ((page == 0x3f || page == 0x2a) |
| 702 |
&& (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM)) {
|
| 703 |
/* CD Capabilities and Mechanical Status page. */
|
| 704 |
p[0] = 0x2a; |
| 705 |
p[1] = 0x14; |
| 706 |
p[2] = 3; // CD-R & CD-RW read |
| 707 |
p[3] = 0; // Writing not supported |
| 708 |
p[4] = 0x7f; /* Audio, composite, digital out, |
| 709 |
mode 2 form 1&2, multi session */
|
| 710 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
| 711 |
RW corrected, C2 errors, ISRC,
|
| 712 |
UPC, Bar code */
|
| 713 |
p[6] = 0x2d | (bdrv_is_locked(s->bdrv)? 2 : 0); |
| 714 |
/* Locking supported, jumper present, eject, tray */
|
| 715 |
p[7] = 0; /* no volume & mute control, no |
| 716 |
changer */
|
| 717 |
p[8] = (50 * 176) >> 8; // 50x read speed |
| 718 |
p[9] = (50 * 176) & 0xff; |
| 719 |
p[10] = 0 >> 8; // No volume |
| 720 |
p[11] = 0 & 0xff; |
| 721 |
p[12] = 2048 >> 8; // 2M buffer |
| 722 |
p[13] = 2048 & 0xff; |
| 723 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
| 724 |
p[15] = (16 * 176) & 0xff; |
| 725 |
p[18] = (16 * 176) >> 8; // 16x write speed |
| 726 |
p[19] = (16 * 176) & 0xff; |
| 727 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
| 728 |
p[21] = (16 * 176) & 0xff; |
| 729 |
p += 22;
|
| 730 |
} |
| 731 |
r->iov.iov_len = p - outbuf; |
| 732 |
outbuf[0] = r->iov.iov_len - 4; |
| 733 |
if (r->iov.iov_len > len)
|
| 734 |
r->iov.iov_len = len; |
| 735 |
} |
| 736 |
break;
|
| 737 |
case 0x1b: |
| 738 |
DPRINTF("Start Stop Unit\n");
|
| 739 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM &&
|
| 740 |
(buf[4] & 2)) |
| 741 |
/* load/eject medium */
|
| 742 |
bdrv_eject(s->bdrv, !(buf[4] & 1)); |
| 743 |
break;
|
| 744 |
case 0x1e: |
| 745 |
DPRINTF("Prevent Allow Medium Removal (prevent = %d)\n", buf[4] & 3); |
| 746 |
bdrv_set_locked(s->bdrv, buf[4] & 1); |
| 747 |
break;
|
| 748 |
case 0x25: |
| 749 |
DPRINTF("Read Capacity\n");
|
| 750 |
/* The normal LEN field for this command is zero. */
|
| 751 |
memset(outbuf, 0, 8); |
| 752 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
| 753 |
nb_sectors /= s->cluster_size; |
| 754 |
/* Returned value is the address of the last sector. */
|
| 755 |
if (nb_sectors) {
|
| 756 |
nb_sectors--; |
| 757 |
/* Remember the new size for read/write sanity checking. */
|
| 758 |
s->max_lba = nb_sectors; |
| 759 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
| 760 |
if (nb_sectors > UINT32_MAX)
|
| 761 |
nb_sectors = UINT32_MAX; |
| 762 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
| 763 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
| 764 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
| 765 |
outbuf[3] = nb_sectors & 0xff; |
| 766 |
outbuf[4] = 0; |
| 767 |
outbuf[5] = 0; |
| 768 |
outbuf[6] = s->cluster_size * 2; |
| 769 |
outbuf[7] = 0; |
| 770 |
r->iov.iov_len = 8;
|
| 771 |
} else {
|
| 772 |
notready:
|
| 773 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NOT_READY); |
| 774 |
return 0; |
| 775 |
} |
| 776 |
break;
|
| 777 |
case 0x08: |
| 778 |
case 0x28: |
| 779 |
case 0x88: |
| 780 |
DPRINTF("Read (sector %lld, count %d)\n", lba, len);
|
| 781 |
if (lba > s->max_lba)
|
| 782 |
goto illegal_lba;
|
| 783 |
r->sector = lba * s->cluster_size; |
| 784 |
r->sector_count = len * s->cluster_size; |
| 785 |
break;
|
| 786 |
case 0x0a: |
| 787 |
case 0x2a: |
| 788 |
case 0x8a: |
| 789 |
DPRINTF("Write (sector %lld, count %d)\n", lba, len);
|
| 790 |
if (lba > s->max_lba)
|
| 791 |
goto illegal_lba;
|
| 792 |
r->sector = lba * s->cluster_size; |
| 793 |
r->sector_count = len * s->cluster_size; |
| 794 |
is_write = 1;
|
| 795 |
break;
|
| 796 |
case 0x35: |
| 797 |
DPRINTF("Synchronise cache (sector %d, count %d)\n", lba, len);
|
| 798 |
bdrv_flush(s->bdrv); |
| 799 |
break;
|
| 800 |
case 0x43: |
| 801 |
{
|
| 802 |
int start_track, format, msf, toclen;
|
| 803 |
|
| 804 |
msf = buf[1] & 2; |
| 805 |
format = buf[2] & 0xf; |
| 806 |
start_track = buf[6];
|
| 807 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
| 808 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
| 809 |
nb_sectors /= s->cluster_size; |
| 810 |
switch(format) {
|
| 811 |
case 0: |
| 812 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
| 813 |
break;
|
| 814 |
case 1: |
| 815 |
/* multi session : only a single session defined */
|
| 816 |
toclen = 12;
|
| 817 |
memset(outbuf, 0, 12); |
| 818 |
outbuf[1] = 0x0a; |
| 819 |
outbuf[2] = 0x01; |
| 820 |
outbuf[3] = 0x01; |
| 821 |
break;
|
| 822 |
case 2: |
| 823 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
| 824 |
break;
|
| 825 |
default:
|
| 826 |
goto error_cmd;
|
| 827 |
} |
| 828 |
if (toclen > 0) { |
| 829 |
if (len > toclen)
|
| 830 |
len = toclen; |
| 831 |
r->iov.iov_len = len; |
| 832 |
break;
|
| 833 |
} |
| 834 |
error_cmd:
|
| 835 |
DPRINTF("Read TOC error\n");
|
| 836 |
goto fail;
|
| 837 |
} |
| 838 |
case 0x46: |
| 839 |
DPRINTF("Get Configuration (rt %d, maxlen %d)\n", buf[1] & 3, len); |
| 840 |
memset(outbuf, 0, 8); |
| 841 |
/* ??? This should probably return much more information. For now
|
| 842 |
just return the basic header indicating the CD-ROM profile. */
|
| 843 |
outbuf[7] = 8; // CD-ROM |
| 844 |
r->iov.iov_len = 8;
|
| 845 |
break;
|
| 846 |
case 0x56: |
| 847 |
DPRINTF("Reserve(10)\n");
|
| 848 |
if (buf[1] & 3) |
| 849 |
goto fail;
|
| 850 |
break;
|
| 851 |
case 0x57: |
| 852 |
DPRINTF("Release(10)\n");
|
| 853 |
if (buf[1] & 3) |
| 854 |
goto fail;
|
| 855 |
break;
|
| 856 |
case 0x9e: |
| 857 |
/* Service Action In subcommands. */
|
| 858 |
if ((buf[1] & 31) == 0x10) { |
| 859 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
| 860 |
memset(outbuf, 0, len);
|
| 861 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
| 862 |
nb_sectors /= s->cluster_size; |
| 863 |
/* Returned value is the address of the last sector. */
|
| 864 |
if (nb_sectors) {
|
| 865 |
nb_sectors--; |
| 866 |
/* Remember the new size for read/write sanity checking. */
|
| 867 |
s->max_lba = nb_sectors; |
| 868 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
| 869 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
| 870 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
| 871 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
| 872 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
| 873 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
| 874 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
| 875 |
outbuf[7] = nb_sectors & 0xff; |
| 876 |
outbuf[8] = 0; |
| 877 |
outbuf[9] = 0; |
| 878 |
outbuf[10] = s->cluster_size * 2; |
| 879 |
outbuf[11] = 0; |
| 880 |
/* Protection, exponent and lowest lba field left blank. */
|
| 881 |
r->iov.iov_len = len; |
| 882 |
} else {
|
| 883 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NOT_READY); |
| 884 |
return 0; |
| 885 |
} |
| 886 |
break;
|
| 887 |
} |
| 888 |
DPRINTF("Unsupported Service Action In\n");
|
| 889 |
goto fail;
|
| 890 |
case 0xa0: |
| 891 |
DPRINTF("Report LUNs (len %d)\n", len);
|
| 892 |
if (len < 16) |
| 893 |
goto fail;
|
| 894 |
memset(outbuf, 0, 16); |
| 895 |
outbuf[3] = 8; |
| 896 |
r->iov.iov_len = 16;
|
| 897 |
break;
|
| 898 |
case 0x2f: |
| 899 |
DPRINTF("Verify (sector %d, count %d)\n", lba, len);
|
| 900 |
break;
|
| 901 |
default:
|
| 902 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
| 903 |
fail:
|
| 904 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_ILLEGAL_REQUEST); |
| 905 |
return 0; |
| 906 |
illegal_lba:
|
| 907 |
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR); |
| 908 |
return 0; |
| 909 |
} |
| 910 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
| 911 |
scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE); |
| 912 |
} |
| 913 |
len = r->sector_count * 512 + r->iov.iov_len;
|
| 914 |
if (is_write) {
|
| 915 |
return -len;
|
| 916 |
} else {
|
| 917 |
if (!r->sector_count)
|
| 918 |
r->sector_count = -1;
|
| 919 |
return len;
|
| 920 |
} |
| 921 |
} |
| 922 |
|
| 923 |
static void scsi_destroy(SCSIDevice *d) |
| 924 |
{
|
| 925 |
qemu_free(d->state); |
| 926 |
qemu_free(d); |
| 927 |
} |
| 928 |
|
| 929 |
SCSIDevice *scsi_disk_init(BlockDriverState *bdrv, int tcq,
|
| 930 |
scsi_completionfn completion, void *opaque)
|
| 931 |
{
|
| 932 |
SCSIDevice *d; |
| 933 |
SCSIDeviceState *s; |
| 934 |
uint64_t nb_sectors; |
| 935 |
|
| 936 |
s = (SCSIDeviceState *)qemu_mallocz(sizeof(SCSIDeviceState));
|
| 937 |
s->bdrv = bdrv; |
| 938 |
s->tcq = tcq; |
| 939 |
s->completion = completion; |
| 940 |
s->opaque = opaque; |
| 941 |
if (bdrv_get_type_hint(s->bdrv) == BDRV_TYPE_CDROM) {
|
| 942 |
s->cluster_size = 4;
|
| 943 |
} else {
|
| 944 |
s->cluster_size = 1;
|
| 945 |
} |
| 946 |
bdrv_get_geometry(s->bdrv, &nb_sectors); |
| 947 |
nb_sectors /= s->cluster_size; |
| 948 |
if (nb_sectors)
|
| 949 |
nb_sectors--; |
| 950 |
s->max_lba = nb_sectors; |
| 951 |
strncpy(s->drive_serial_str, drive_get_serial(s->bdrv), |
| 952 |
sizeof(s->drive_serial_str));
|
| 953 |
if (strlen(s->drive_serial_str) == 0) |
| 954 |
pstrcpy(s->drive_serial_str, sizeof(s->drive_serial_str), "0"); |
| 955 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
| 956 |
d = (SCSIDevice *)qemu_mallocz(sizeof(SCSIDevice));
|
| 957 |
d->state = s; |
| 958 |
d->destroy = scsi_destroy; |
| 959 |
d->send_command = scsi_send_command; |
| 960 |
d->read_data = scsi_read_data; |
| 961 |
d->write_data = scsi_write_data; |
| 962 |
d->cancel_io = scsi_cancel_io; |
| 963 |
d->get_buf = scsi_get_buf; |
| 964 |
|
| 965 |
return d;
|
| 966 |
} |