root / hw / scsi-disk.c @ 5dba48a8
History | View | Annotate | Download (37.1 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 |
|
| 49 |
typedef struct SCSIDiskState SCSIDiskState; |
| 50 |
|
| 51 |
typedef struct SCSIDiskReq { |
| 52 |
SCSIRequest req; |
| 53 |
/* ??? We should probably keep track of whether the data transfer is
|
| 54 |
a read or a write. Currently we rely on the host getting it right. */
|
| 55 |
/* Both sector and sector_count are in terms of qemu 512 byte blocks. */
|
| 56 |
uint64_t sector; |
| 57 |
uint32_t sector_count; |
| 58 |
struct iovec iov;
|
| 59 |
QEMUIOVector qiov; |
| 60 |
uint32_t status; |
| 61 |
} SCSIDiskReq; |
| 62 |
|
| 63 |
struct SCSIDiskState
|
| 64 |
{
|
| 65 |
SCSIDevice qdev; |
| 66 |
BlockDriverState *bs; |
| 67 |
/* The qemu block layer uses a fixed 512 byte sector size.
|
| 68 |
This is the number of 512 byte blocks in a single scsi sector. */
|
| 69 |
int cluster_size;
|
| 70 |
uint64_t max_lba; |
| 71 |
QEMUBH *bh; |
| 72 |
char *version;
|
| 73 |
char *serial;
|
| 74 |
}; |
| 75 |
|
| 76 |
static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type); |
| 77 |
|
| 78 |
static SCSIDiskReq *scsi_new_request(SCSIDiskState *s, uint32_t tag,
|
| 79 |
uint32_t lun) |
| 80 |
{
|
| 81 |
SCSIRequest *req; |
| 82 |
SCSIDiskReq *r; |
| 83 |
|
| 84 |
req = scsi_req_alloc(sizeof(SCSIDiskReq), &s->qdev, tag, lun);
|
| 85 |
r = DO_UPCAST(SCSIDiskReq, req, req); |
| 86 |
r->iov.iov_base = qemu_blockalign(s->bs, SCSI_DMA_BUF_SIZE); |
| 87 |
return r;
|
| 88 |
} |
| 89 |
|
| 90 |
static void scsi_remove_request(SCSIDiskReq *r) |
| 91 |
{
|
| 92 |
qemu_vfree(r->iov.iov_base); |
| 93 |
scsi_req_free(&r->req); |
| 94 |
} |
| 95 |
|
| 96 |
static SCSIDiskReq *scsi_find_request(SCSIDiskState *s, uint32_t tag)
|
| 97 |
{
|
| 98 |
return DO_UPCAST(SCSIDiskReq, req, scsi_req_find(&s->qdev, tag));
|
| 99 |
} |
| 100 |
|
| 101 |
static void scsi_req_set_status(SCSIRequest *req, int status, int sense_code) |
| 102 |
{
|
| 103 |
req->status = status; |
| 104 |
scsi_dev_set_sense(req->dev, sense_code); |
| 105 |
} |
| 106 |
|
| 107 |
/* Helper function for command completion. */
|
| 108 |
static void scsi_command_complete(SCSIDiskReq *r, int status, int sense) |
| 109 |
{
|
| 110 |
DPRINTF("Command complete tag=0x%x status=%d sense=%d\n",
|
| 111 |
r->req.tag, status, sense); |
| 112 |
scsi_req_set_status(&r->req, status, sense); |
| 113 |
scsi_req_complete(&r->req); |
| 114 |
scsi_remove_request(r); |
| 115 |
} |
| 116 |
|
| 117 |
/* Cancel a pending data transfer. */
|
| 118 |
static void scsi_cancel_io(SCSIDevice *d, uint32_t tag) |
| 119 |
{
|
| 120 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
| 121 |
SCSIDiskReq *r; |
| 122 |
DPRINTF("Cancel tag=0x%x\n", tag);
|
| 123 |
r = scsi_find_request(s, tag); |
| 124 |
if (r) {
|
| 125 |
if (r->req.aiocb)
|
| 126 |
bdrv_aio_cancel(r->req.aiocb); |
| 127 |
r->req.aiocb = NULL;
|
| 128 |
scsi_remove_request(r); |
| 129 |
} |
| 130 |
} |
| 131 |
|
| 132 |
static void scsi_read_complete(void * opaque, int ret) |
| 133 |
{
|
| 134 |
SCSIDiskReq *r = (SCSIDiskReq *)opaque; |
| 135 |
int n;
|
| 136 |
|
| 137 |
r->req.aiocb = NULL;
|
| 138 |
|
| 139 |
if (ret) {
|
| 140 |
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_READ)) {
|
| 141 |
return;
|
| 142 |
} |
| 143 |
} |
| 144 |
|
| 145 |
DPRINTF("Data ready tag=0x%x len=%zd\n", r->req.tag, r->iov.iov_len);
|
| 146 |
|
| 147 |
n = r->iov.iov_len / 512;
|
| 148 |
r->sector += n; |
| 149 |
r->sector_count -= n; |
| 150 |
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len); |
| 151 |
} |
| 152 |
|
| 153 |
|
| 154 |
static void scsi_read_request(SCSIDiskReq *r) |
| 155 |
{
|
| 156 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
| 157 |
uint32_t n; |
| 158 |
|
| 159 |
if (r->sector_count == (uint32_t)-1) { |
| 160 |
DPRINTF("Read buf_len=%zd\n", r->iov.iov_len);
|
| 161 |
r->sector_count = 0;
|
| 162 |
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, r->iov.iov_len); |
| 163 |
return;
|
| 164 |
} |
| 165 |
DPRINTF("Read sector_count=%d\n", r->sector_count);
|
| 166 |
if (r->sector_count == 0) { |
| 167 |
scsi_command_complete(r, GOOD, NO_SENSE); |
| 168 |
return;
|
| 169 |
} |
| 170 |
|
| 171 |
n = r->sector_count; |
| 172 |
if (n > SCSI_DMA_BUF_SIZE / 512) |
| 173 |
n = SCSI_DMA_BUF_SIZE / 512;
|
| 174 |
|
| 175 |
r->iov.iov_len = n * 512;
|
| 176 |
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
|
| 177 |
r->req.aiocb = bdrv_aio_readv(s->bs, r->sector, &r->qiov, n, |
| 178 |
scsi_read_complete, r); |
| 179 |
if (r->req.aiocb == NULL) |
| 180 |
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
| 181 |
} |
| 182 |
|
| 183 |
/* Read more data from scsi device into buffer. */
|
| 184 |
static void scsi_read_data(SCSIDevice *d, uint32_t tag) |
| 185 |
{
|
| 186 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
| 187 |
SCSIDiskReq *r; |
| 188 |
|
| 189 |
r = scsi_find_request(s, tag); |
| 190 |
if (!r) {
|
| 191 |
BADF("Bad read tag 0x%x\n", tag);
|
| 192 |
/* ??? This is the wrong error. */
|
| 193 |
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
| 194 |
return;
|
| 195 |
} |
| 196 |
|
| 197 |
/* No data transfer may already be in progress */
|
| 198 |
assert(r->req.aiocb == NULL);
|
| 199 |
|
| 200 |
scsi_read_request(r); |
| 201 |
} |
| 202 |
|
| 203 |
static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type) |
| 204 |
{
|
| 205 |
int is_read = (type == SCSI_REQ_STATUS_RETRY_READ);
|
| 206 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
| 207 |
BlockErrorAction action = bdrv_get_on_error(s->bs, is_read); |
| 208 |
|
| 209 |
if (action == BLOCK_ERR_IGNORE) {
|
| 210 |
bdrv_mon_event(s->bs, BDRV_ACTION_IGNORE, is_read); |
| 211 |
return 0; |
| 212 |
} |
| 213 |
|
| 214 |
if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC)
|
| 215 |
|| action == BLOCK_ERR_STOP_ANY) {
|
| 216 |
|
| 217 |
type &= SCSI_REQ_STATUS_RETRY_TYPE_MASK; |
| 218 |
r->status |= SCSI_REQ_STATUS_RETRY | type; |
| 219 |
|
| 220 |
bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read); |
| 221 |
vm_stop(0);
|
| 222 |
} else {
|
| 223 |
if (type == SCSI_REQ_STATUS_RETRY_READ) {
|
| 224 |
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, 0);
|
| 225 |
} |
| 226 |
scsi_command_complete(r, CHECK_CONDITION, |
| 227 |
HARDWARE_ERROR); |
| 228 |
bdrv_mon_event(s->bs, BDRV_ACTION_REPORT, is_read); |
| 229 |
} |
| 230 |
|
| 231 |
return 1; |
| 232 |
} |
| 233 |
|
| 234 |
static void scsi_write_complete(void * opaque, int ret) |
| 235 |
{
|
| 236 |
SCSIDiskReq *r = (SCSIDiskReq *)opaque; |
| 237 |
uint32_t len; |
| 238 |
uint32_t n; |
| 239 |
|
| 240 |
r->req.aiocb = NULL;
|
| 241 |
|
| 242 |
if (ret) {
|
| 243 |
if (scsi_handle_rw_error(r, -ret, SCSI_REQ_STATUS_RETRY_WRITE)) {
|
| 244 |
return;
|
| 245 |
} |
| 246 |
} |
| 247 |
|
| 248 |
n = r->iov.iov_len / 512;
|
| 249 |
r->sector += n; |
| 250 |
r->sector_count -= n; |
| 251 |
if (r->sector_count == 0) { |
| 252 |
scsi_command_complete(r, GOOD, NO_SENSE); |
| 253 |
} else {
|
| 254 |
len = r->sector_count * 512;
|
| 255 |
if (len > SCSI_DMA_BUF_SIZE) {
|
| 256 |
len = SCSI_DMA_BUF_SIZE; |
| 257 |
} |
| 258 |
r->iov.iov_len = len; |
| 259 |
DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, len);
|
| 260 |
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, len); |
| 261 |
} |
| 262 |
} |
| 263 |
|
| 264 |
static void scsi_write_request(SCSIDiskReq *r) |
| 265 |
{
|
| 266 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev); |
| 267 |
uint32_t n; |
| 268 |
|
| 269 |
n = r->iov.iov_len / 512;
|
| 270 |
if (n) {
|
| 271 |
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
|
| 272 |
r->req.aiocb = bdrv_aio_writev(s->bs, r->sector, &r->qiov, n, |
| 273 |
scsi_write_complete, r); |
| 274 |
if (r->req.aiocb == NULL) |
| 275 |
scsi_command_complete(r, CHECK_CONDITION, |
| 276 |
HARDWARE_ERROR); |
| 277 |
} else {
|
| 278 |
/* Invoke completion routine to fetch data from host. */
|
| 279 |
scsi_write_complete(r, 0);
|
| 280 |
} |
| 281 |
} |
| 282 |
|
| 283 |
/* Write data to a scsi device. Returns nonzero on failure.
|
| 284 |
The transfer may complete asynchronously. */
|
| 285 |
static int scsi_write_data(SCSIDevice *d, uint32_t tag) |
| 286 |
{
|
| 287 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
| 288 |
SCSIDiskReq *r; |
| 289 |
|
| 290 |
DPRINTF("Write data tag=0x%x\n", tag);
|
| 291 |
r = scsi_find_request(s, tag); |
| 292 |
if (!r) {
|
| 293 |
BADF("Bad write tag 0x%x\n", tag);
|
| 294 |
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
| 295 |
return 1; |
| 296 |
} |
| 297 |
|
| 298 |
/* No data transfer may already be in progress */
|
| 299 |
assert(r->req.aiocb == NULL);
|
| 300 |
|
| 301 |
scsi_write_request(r); |
| 302 |
|
| 303 |
return 0; |
| 304 |
} |
| 305 |
|
| 306 |
static void scsi_dma_restart_bh(void *opaque) |
| 307 |
{
|
| 308 |
SCSIDiskState *s = opaque; |
| 309 |
SCSIRequest *req; |
| 310 |
SCSIDiskReq *r; |
| 311 |
|
| 312 |
qemu_bh_delete(s->bh); |
| 313 |
s->bh = NULL;
|
| 314 |
|
| 315 |
QTAILQ_FOREACH(req, &s->qdev.requests, next) {
|
| 316 |
r = DO_UPCAST(SCSIDiskReq, req, req); |
| 317 |
if (r->status & SCSI_REQ_STATUS_RETRY) {
|
| 318 |
int status = r->status;
|
| 319 |
r->status &= |
| 320 |
~(SCSI_REQ_STATUS_RETRY | SCSI_REQ_STATUS_RETRY_TYPE_MASK); |
| 321 |
|
| 322 |
switch (status & SCSI_REQ_STATUS_RETRY_TYPE_MASK) {
|
| 323 |
case SCSI_REQ_STATUS_RETRY_READ:
|
| 324 |
scsi_read_request(r); |
| 325 |
break;
|
| 326 |
case SCSI_REQ_STATUS_RETRY_WRITE:
|
| 327 |
scsi_write_request(r); |
| 328 |
break;
|
| 329 |
} |
| 330 |
} |
| 331 |
} |
| 332 |
} |
| 333 |
|
| 334 |
static void scsi_dma_restart_cb(void *opaque, int running, int reason) |
| 335 |
{
|
| 336 |
SCSIDiskState *s = opaque; |
| 337 |
|
| 338 |
if (!running)
|
| 339 |
return;
|
| 340 |
|
| 341 |
if (!s->bh) {
|
| 342 |
s->bh = qemu_bh_new(scsi_dma_restart_bh, s); |
| 343 |
qemu_bh_schedule(s->bh); |
| 344 |
} |
| 345 |
} |
| 346 |
|
| 347 |
/* Return a pointer to the data buffer. */
|
| 348 |
static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
|
| 349 |
{
|
| 350 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
| 351 |
SCSIDiskReq *r; |
| 352 |
|
| 353 |
r = scsi_find_request(s, tag); |
| 354 |
if (!r) {
|
| 355 |
BADF("Bad buffer tag 0x%x\n", tag);
|
| 356 |
return NULL; |
| 357 |
} |
| 358 |
return (uint8_t *)r->iov.iov_base;
|
| 359 |
} |
| 360 |
|
| 361 |
static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf) |
| 362 |
{
|
| 363 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 364 |
int buflen = 0; |
| 365 |
|
| 366 |
if (req->cmd.buf[1] & 0x2) { |
| 367 |
/* Command support data - optional, not implemented */
|
| 368 |
BADF("optional INQUIRY command support request not implemented\n");
|
| 369 |
return -1; |
| 370 |
} |
| 371 |
|
| 372 |
if (req->cmd.buf[1] & 0x1) { |
| 373 |
/* Vital product data */
|
| 374 |
uint8_t page_code = req->cmd.buf[2];
|
| 375 |
if (req->cmd.xfer < 4) { |
| 376 |
BADF("Error: Inquiry (EVPD[%02X]) buffer size %zd is "
|
| 377 |
"less than 4\n", page_code, req->cmd.xfer);
|
| 378 |
return -1; |
| 379 |
} |
| 380 |
|
| 381 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
|
| 382 |
outbuf[buflen++] = 5;
|
| 383 |
} else {
|
| 384 |
outbuf[buflen++] = 0;
|
| 385 |
} |
| 386 |
outbuf[buflen++] = page_code ; // this page
|
| 387 |
outbuf[buflen++] = 0x00;
|
| 388 |
|
| 389 |
switch (page_code) {
|
| 390 |
case 0x00: /* Supported page codes, mandatory */ |
| 391 |
DPRINTF("Inquiry EVPD[Supported pages] "
|
| 392 |
"buffer size %zd\n", req->cmd.xfer);
|
| 393 |
outbuf[buflen++] = 4; // number of pages |
| 394 |
outbuf[buflen++] = 0x00; // list of supported pages (this page) |
| 395 |
outbuf[buflen++] = 0x80; // unit serial number |
| 396 |
outbuf[buflen++] = 0x83; // device identification |
| 397 |
outbuf[buflen++] = 0xb0; // block device characteristics |
| 398 |
break;
|
| 399 |
|
| 400 |
case 0x80: /* Device serial number, optional */ |
| 401 |
{
|
| 402 |
int l = strlen(s->serial);
|
| 403 |
|
| 404 |
if (l > req->cmd.xfer)
|
| 405 |
l = req->cmd.xfer; |
| 406 |
if (l > 20) |
| 407 |
l = 20;
|
| 408 |
|
| 409 |
DPRINTF("Inquiry EVPD[Serial number] "
|
| 410 |
"buffer size %zd\n", req->cmd.xfer);
|
| 411 |
outbuf[buflen++] = l; |
| 412 |
memcpy(outbuf+buflen, s->serial, l); |
| 413 |
buflen += l; |
| 414 |
break;
|
| 415 |
} |
| 416 |
|
| 417 |
case 0x83: /* Device identification page, mandatory */ |
| 418 |
{
|
| 419 |
int max_len = 255 - 8; |
| 420 |
int id_len = strlen(bdrv_get_device_name(s->bs));
|
| 421 |
|
| 422 |
if (id_len > max_len)
|
| 423 |
id_len = max_len; |
| 424 |
DPRINTF("Inquiry EVPD[Device identification] "
|
| 425 |
"buffer size %zd\n", req->cmd.xfer);
|
| 426 |
|
| 427 |
outbuf[buflen++] = 3 + id_len;
|
| 428 |
outbuf[buflen++] = 0x2; // ASCII |
| 429 |
outbuf[buflen++] = 0; // not officially assigned |
| 430 |
outbuf[buflen++] = 0; // reserved |
| 431 |
outbuf[buflen++] = id_len; // length of data following
|
| 432 |
|
| 433 |
memcpy(outbuf+buflen, bdrv_get_device_name(s->bs), id_len); |
| 434 |
buflen += id_len; |
| 435 |
break;
|
| 436 |
} |
| 437 |
case 0xb0: /* block device characteristics */ |
| 438 |
{
|
| 439 |
unsigned int min_io_size = |
| 440 |
s->qdev.conf.min_io_size / s->qdev.blocksize; |
| 441 |
unsigned int opt_io_size = |
| 442 |
s->qdev.conf.opt_io_size / s->qdev.blocksize; |
| 443 |
|
| 444 |
/* required VPD size with unmap support */
|
| 445 |
outbuf[3] = buflen = 0x3c; |
| 446 |
|
| 447 |
memset(outbuf + 4, 0, buflen - 4); |
| 448 |
|
| 449 |
/* optimal transfer length granularity */
|
| 450 |
outbuf[6] = (min_io_size >> 8) & 0xff; |
| 451 |
outbuf[7] = min_io_size & 0xff; |
| 452 |
|
| 453 |
/* optimal transfer length */
|
| 454 |
outbuf[12] = (opt_io_size >> 24) & 0xff; |
| 455 |
outbuf[13] = (opt_io_size >> 16) & 0xff; |
| 456 |
outbuf[14] = (opt_io_size >> 8) & 0xff; |
| 457 |
outbuf[15] = opt_io_size & 0xff; |
| 458 |
break;
|
| 459 |
} |
| 460 |
default:
|
| 461 |
BADF("Error: unsupported Inquiry (EVPD[%02X]) "
|
| 462 |
"buffer size %zd\n", page_code, req->cmd.xfer);
|
| 463 |
return -1; |
| 464 |
} |
| 465 |
/* done with EVPD */
|
| 466 |
return buflen;
|
| 467 |
} |
| 468 |
|
| 469 |
/* Standard INQUIRY data */
|
| 470 |
if (req->cmd.buf[2] != 0) { |
| 471 |
BADF("Error: Inquiry (STANDARD) page or code "
|
| 472 |
"is non-zero [%02X]\n", req->cmd.buf[2]); |
| 473 |
return -1; |
| 474 |
} |
| 475 |
|
| 476 |
/* PAGE CODE == 0 */
|
| 477 |
if (req->cmd.xfer < 5) { |
| 478 |
BADF("Error: Inquiry (STANDARD) buffer size %zd "
|
| 479 |
"is less than 5\n", req->cmd.xfer);
|
| 480 |
return -1; |
| 481 |
} |
| 482 |
|
| 483 |
buflen = req->cmd.xfer; |
| 484 |
if (buflen > SCSI_MAX_INQUIRY_LEN)
|
| 485 |
buflen = SCSI_MAX_INQUIRY_LEN; |
| 486 |
|
| 487 |
memset(outbuf, 0, buflen);
|
| 488 |
|
| 489 |
if (req->lun || req->cmd.buf[1] >> 5) { |
| 490 |
outbuf[0] = 0x7f; /* LUN not supported */ |
| 491 |
return buflen;
|
| 492 |
} |
| 493 |
|
| 494 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM) {
|
| 495 |
outbuf[0] = 5; |
| 496 |
outbuf[1] = 0x80; |
| 497 |
memcpy(&outbuf[16], "QEMU CD-ROM ", 16); |
| 498 |
} else {
|
| 499 |
outbuf[0] = 0; |
| 500 |
memcpy(&outbuf[16], "QEMU HARDDISK ", 16); |
| 501 |
} |
| 502 |
memcpy(&outbuf[8], "QEMU ", 8); |
| 503 |
memset(&outbuf[32], 0, 4); |
| 504 |
memcpy(&outbuf[32], s->version, MIN(4, strlen(s->version))); |
| 505 |
/*
|
| 506 |
* We claim conformance to SPC-3, which is required for guests
|
| 507 |
* to ask for modern features like READ CAPACITY(16) or the
|
| 508 |
* block characteristics VPD page by default. Not all of SPC-3
|
| 509 |
* is actually implemented, but we're good enough.
|
| 510 |
*/
|
| 511 |
outbuf[2] = 5; |
| 512 |
outbuf[3] = 2; /* Format 2 */ |
| 513 |
|
| 514 |
if (buflen > 36) { |
| 515 |
outbuf[4] = buflen - 5; /* Additional Length = (Len - 1) - 4 */ |
| 516 |
} else {
|
| 517 |
/* If the allocation length of CDB is too small,
|
| 518 |
the additional length is not adjusted */
|
| 519 |
outbuf[4] = 36 - 5; |
| 520 |
} |
| 521 |
|
| 522 |
/* Sync data transfer and TCQ. */
|
| 523 |
outbuf[7] = 0x10 | (req->bus->tcq ? 0x02 : 0); |
| 524 |
return buflen;
|
| 525 |
} |
| 526 |
|
| 527 |
static int mode_sense_page(SCSIRequest *req, int page, uint8_t *p, |
| 528 |
int page_control)
|
| 529 |
{
|
| 530 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 531 |
BlockDriverState *bdrv = s->bs; |
| 532 |
int cylinders, heads, secs;
|
| 533 |
|
| 534 |
/*
|
| 535 |
* If Changeable Values are requested, a mask denoting those mode parameters
|
| 536 |
* that are changeable shall be returned. As we currently don't support
|
| 537 |
* parameter changes via MODE_SELECT all bits are returned set to zero.
|
| 538 |
* The buffer was already menset to zero by the caller of this function.
|
| 539 |
*/
|
| 540 |
switch (page) {
|
| 541 |
case 4: /* Rigid disk device geometry page. */ |
| 542 |
p[0] = 4; |
| 543 |
p[1] = 0x16; |
| 544 |
if (page_control == 1) { /* Changeable Values */ |
| 545 |
return p[1] + 2; |
| 546 |
} |
| 547 |
/* if a geometry hint is available, use it */
|
| 548 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
| 549 |
p[2] = (cylinders >> 16) & 0xff; |
| 550 |
p[3] = (cylinders >> 8) & 0xff; |
| 551 |
p[4] = cylinders & 0xff; |
| 552 |
p[5] = heads & 0xff; |
| 553 |
/* Write precomp start cylinder, disabled */
|
| 554 |
p[6] = (cylinders >> 16) & 0xff; |
| 555 |
p[7] = (cylinders >> 8) & 0xff; |
| 556 |
p[8] = cylinders & 0xff; |
| 557 |
/* Reduced current start cylinder, disabled */
|
| 558 |
p[9] = (cylinders >> 16) & 0xff; |
| 559 |
p[10] = (cylinders >> 8) & 0xff; |
| 560 |
p[11] = cylinders & 0xff; |
| 561 |
/* Device step rate [ns], 200ns */
|
| 562 |
p[12] = 0; |
| 563 |
p[13] = 200; |
| 564 |
/* Landing zone cylinder */
|
| 565 |
p[14] = 0xff; |
| 566 |
p[15] = 0xff; |
| 567 |
p[16] = 0xff; |
| 568 |
/* Medium rotation rate [rpm], 5400 rpm */
|
| 569 |
p[20] = (5400 >> 8) & 0xff; |
| 570 |
p[21] = 5400 & 0xff; |
| 571 |
return p[1] + 2; |
| 572 |
|
| 573 |
case 5: /* Flexible disk device geometry page. */ |
| 574 |
p[0] = 5; |
| 575 |
p[1] = 0x1e; |
| 576 |
if (page_control == 1) { /* Changeable Values */ |
| 577 |
return p[1] + 2; |
| 578 |
} |
| 579 |
/* Transfer rate [kbit/s], 5Mbit/s */
|
| 580 |
p[2] = 5000 >> 8; |
| 581 |
p[3] = 5000 & 0xff; |
| 582 |
/* if a geometry hint is available, use it */
|
| 583 |
bdrv_get_geometry_hint(bdrv, &cylinders, &heads, &secs); |
| 584 |
p[4] = heads & 0xff; |
| 585 |
p[5] = secs & 0xff; |
| 586 |
p[6] = s->cluster_size * 2; |
| 587 |
p[8] = (cylinders >> 8) & 0xff; |
| 588 |
p[9] = cylinders & 0xff; |
| 589 |
/* Write precomp start cylinder, disabled */
|
| 590 |
p[10] = (cylinders >> 8) & 0xff; |
| 591 |
p[11] = cylinders & 0xff; |
| 592 |
/* Reduced current start cylinder, disabled */
|
| 593 |
p[12] = (cylinders >> 8) & 0xff; |
| 594 |
p[13] = cylinders & 0xff; |
| 595 |
/* Device step rate [100us], 100us */
|
| 596 |
p[14] = 0; |
| 597 |
p[15] = 1; |
| 598 |
/* Device step pulse width [us], 1us */
|
| 599 |
p[16] = 1; |
| 600 |
/* Device head settle delay [100us], 100us */
|
| 601 |
p[17] = 0; |
| 602 |
p[18] = 1; |
| 603 |
/* Motor on delay [0.1s], 0.1s */
|
| 604 |
p[19] = 1; |
| 605 |
/* Motor off delay [0.1s], 0.1s */
|
| 606 |
p[20] = 1; |
| 607 |
/* Medium rotation rate [rpm], 5400 rpm */
|
| 608 |
p[28] = (5400 >> 8) & 0xff; |
| 609 |
p[29] = 5400 & 0xff; |
| 610 |
return p[1] + 2; |
| 611 |
|
| 612 |
case 8: /* Caching page. */ |
| 613 |
p[0] = 8; |
| 614 |
p[1] = 0x12; |
| 615 |
if (page_control == 1) { /* Changeable Values */ |
| 616 |
return p[1] + 2; |
| 617 |
} |
| 618 |
if (bdrv_enable_write_cache(s->bs)) {
|
| 619 |
p[2] = 4; /* WCE */ |
| 620 |
} |
| 621 |
return p[1] + 2; |
| 622 |
|
| 623 |
case 0x2a: /* CD Capabilities and Mechanical Status page. */ |
| 624 |
if (bdrv_get_type_hint(bdrv) != BDRV_TYPE_CDROM)
|
| 625 |
return 0; |
| 626 |
p[0] = 0x2a; |
| 627 |
p[1] = 0x14; |
| 628 |
if (page_control == 1) { /* Changeable Values */ |
| 629 |
return p[1] + 2; |
| 630 |
} |
| 631 |
p[2] = 3; // CD-R & CD-RW read |
| 632 |
p[3] = 0; // Writing not supported |
| 633 |
p[4] = 0x7f; /* Audio, composite, digital out, |
| 634 |
mode 2 form 1&2, multi session */
|
| 635 |
p[5] = 0xff; /* CD DA, DA accurate, RW supported, |
| 636 |
RW corrected, C2 errors, ISRC,
|
| 637 |
UPC, Bar code */
|
| 638 |
p[6] = 0x2d | (bdrv_is_locked(s->bs)? 2 : 0); |
| 639 |
/* Locking supported, jumper present, eject, tray */
|
| 640 |
p[7] = 0; /* no volume & mute control, no |
| 641 |
changer */
|
| 642 |
p[8] = (50 * 176) >> 8; // 50x read speed |
| 643 |
p[9] = (50 * 176) & 0xff; |
| 644 |
p[10] = 0 >> 8; // No volume |
| 645 |
p[11] = 0 & 0xff; |
| 646 |
p[12] = 2048 >> 8; // 2M buffer |
| 647 |
p[13] = 2048 & 0xff; |
| 648 |
p[14] = (16 * 176) >> 8; // 16x read speed current |
| 649 |
p[15] = (16 * 176) & 0xff; |
| 650 |
p[18] = (16 * 176) >> 8; // 16x write speed |
| 651 |
p[19] = (16 * 176) & 0xff; |
| 652 |
p[20] = (16 * 176) >> 8; // 16x write speed current |
| 653 |
p[21] = (16 * 176) & 0xff; |
| 654 |
return p[1] + 2; |
| 655 |
|
| 656 |
default:
|
| 657 |
return 0; |
| 658 |
} |
| 659 |
} |
| 660 |
|
| 661 |
static int scsi_disk_emulate_mode_sense(SCSIRequest *req, uint8_t *outbuf) |
| 662 |
{
|
| 663 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 664 |
uint64_t nb_sectors; |
| 665 |
int page, dbd, buflen, page_control;
|
| 666 |
uint8_t *p; |
| 667 |
uint8_t dev_specific_param; |
| 668 |
|
| 669 |
dbd = req->cmd.buf[1] & 0x8; |
| 670 |
page = req->cmd.buf[2] & 0x3f; |
| 671 |
page_control = (req->cmd.buf[2] & 0xc0) >> 6; |
| 672 |
DPRINTF("Mode Sense(%d) (page %d, xfer %zd, page_control %d)\n",
|
| 673 |
(req->cmd.buf[0] == MODE_SENSE) ? 6 : 10, page, req->cmd.xfer, page_control); |
| 674 |
memset(outbuf, 0, req->cmd.xfer);
|
| 675 |
p = outbuf; |
| 676 |
|
| 677 |
if (bdrv_is_read_only(s->bs)) {
|
| 678 |
dev_specific_param = 0x80; /* Readonly. */ |
| 679 |
} else {
|
| 680 |
dev_specific_param = 0x00;
|
| 681 |
} |
| 682 |
|
| 683 |
if (req->cmd.buf[0] == MODE_SENSE) { |
| 684 |
p[1] = 0; /* Default media type. */ |
| 685 |
p[2] = dev_specific_param;
|
| 686 |
p[3] = 0; /* Block descriptor length. */ |
| 687 |
p += 4;
|
| 688 |
} else { /* MODE_SENSE_10 */ |
| 689 |
p[2] = 0; /* Default media type. */ |
| 690 |
p[3] = dev_specific_param;
|
| 691 |
p[6] = p[7] = 0; /* Block descriptor length. */ |
| 692 |
p += 8;
|
| 693 |
} |
| 694 |
|
| 695 |
bdrv_get_geometry(s->bs, &nb_sectors); |
| 696 |
if (!dbd && nb_sectors) {
|
| 697 |
if (req->cmd.buf[0] == MODE_SENSE) { |
| 698 |
outbuf[3] = 8; /* Block descriptor length */ |
| 699 |
} else { /* MODE_SENSE_10 */ |
| 700 |
outbuf[7] = 8; /* Block descriptor length */ |
| 701 |
} |
| 702 |
nb_sectors /= s->cluster_size; |
| 703 |
if (nb_sectors > 0xffffff) |
| 704 |
nb_sectors = 0;
|
| 705 |
p[0] = 0; /* media density code */ |
| 706 |
p[1] = (nb_sectors >> 16) & 0xff; |
| 707 |
p[2] = (nb_sectors >> 8) & 0xff; |
| 708 |
p[3] = nb_sectors & 0xff; |
| 709 |
p[4] = 0; /* reserved */ |
| 710 |
p[5] = 0; /* bytes 5-7 are the sector size in bytes */ |
| 711 |
p[6] = s->cluster_size * 2; |
| 712 |
p[7] = 0; |
| 713 |
p += 8;
|
| 714 |
} |
| 715 |
|
| 716 |
if (page_control == 3) { /* Saved Values */ |
| 717 |
return -1; /* ILLEGAL_REQUEST */ |
| 718 |
} |
| 719 |
|
| 720 |
switch (page) {
|
| 721 |
case 0x04: |
| 722 |
case 0x05: |
| 723 |
case 0x08: |
| 724 |
case 0x2a: |
| 725 |
p += mode_sense_page(req, page, p, page_control); |
| 726 |
break;
|
| 727 |
case 0x3f: |
| 728 |
p += mode_sense_page(req, 0x08, p, page_control);
|
| 729 |
p += mode_sense_page(req, 0x2a, p, page_control);
|
| 730 |
break;
|
| 731 |
default:
|
| 732 |
return -1; /* ILLEGAL_REQUEST */ |
| 733 |
} |
| 734 |
|
| 735 |
buflen = p - outbuf; |
| 736 |
/*
|
| 737 |
* The mode data length field specifies the length in bytes of the
|
| 738 |
* following data that is available to be transferred. The mode data
|
| 739 |
* length does not include itself.
|
| 740 |
*/
|
| 741 |
if (req->cmd.buf[0] == MODE_SENSE) { |
| 742 |
outbuf[0] = buflen - 1; |
| 743 |
} else { /* MODE_SENSE_10 */ |
| 744 |
outbuf[0] = ((buflen - 2) >> 8) & 0xff; |
| 745 |
outbuf[1] = (buflen - 2) & 0xff; |
| 746 |
} |
| 747 |
if (buflen > req->cmd.xfer)
|
| 748 |
buflen = req->cmd.xfer; |
| 749 |
return buflen;
|
| 750 |
} |
| 751 |
|
| 752 |
static int scsi_disk_emulate_read_toc(SCSIRequest *req, uint8_t *outbuf) |
| 753 |
{
|
| 754 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 755 |
int start_track, format, msf, toclen;
|
| 756 |
uint64_t nb_sectors; |
| 757 |
|
| 758 |
msf = req->cmd.buf[1] & 2; |
| 759 |
format = req->cmd.buf[2] & 0xf; |
| 760 |
start_track = req->cmd.buf[6];
|
| 761 |
bdrv_get_geometry(s->bs, &nb_sectors); |
| 762 |
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1); |
| 763 |
nb_sectors /= s->cluster_size; |
| 764 |
switch (format) {
|
| 765 |
case 0: |
| 766 |
toclen = cdrom_read_toc(nb_sectors, outbuf, msf, start_track); |
| 767 |
break;
|
| 768 |
case 1: |
| 769 |
/* multi session : only a single session defined */
|
| 770 |
toclen = 12;
|
| 771 |
memset(outbuf, 0, 12); |
| 772 |
outbuf[1] = 0x0a; |
| 773 |
outbuf[2] = 0x01; |
| 774 |
outbuf[3] = 0x01; |
| 775 |
break;
|
| 776 |
case 2: |
| 777 |
toclen = cdrom_read_toc_raw(nb_sectors, outbuf, msf, start_track); |
| 778 |
break;
|
| 779 |
default:
|
| 780 |
return -1; |
| 781 |
} |
| 782 |
if (toclen > req->cmd.xfer)
|
| 783 |
toclen = req->cmd.xfer; |
| 784 |
return toclen;
|
| 785 |
} |
| 786 |
|
| 787 |
static int scsi_disk_emulate_command(SCSIRequest *req, uint8_t *outbuf) |
| 788 |
{
|
| 789 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); |
| 790 |
uint64_t nb_sectors; |
| 791 |
int buflen = 0; |
| 792 |
|
| 793 |
switch (req->cmd.buf[0]) { |
| 794 |
case TEST_UNIT_READY:
|
| 795 |
if (!bdrv_is_inserted(s->bs))
|
| 796 |
goto not_ready;
|
| 797 |
break;
|
| 798 |
case REQUEST_SENSE:
|
| 799 |
if (req->cmd.xfer < 4) |
| 800 |
goto illegal_request;
|
| 801 |
memset(outbuf, 0, 4); |
| 802 |
buflen = 4;
|
| 803 |
if (req->dev->sense.key == NOT_READY && req->cmd.xfer >= 18) { |
| 804 |
memset(outbuf, 0, 18); |
| 805 |
buflen = 18;
|
| 806 |
outbuf[7] = 10; |
| 807 |
/* asc 0x3a, ascq 0: Medium not present */
|
| 808 |
outbuf[12] = 0x3a; |
| 809 |
outbuf[13] = 0; |
| 810 |
} |
| 811 |
outbuf[0] = 0xf0; |
| 812 |
outbuf[1] = 0; |
| 813 |
outbuf[2] = req->dev->sense.key;
|
| 814 |
scsi_dev_clear_sense(req->dev); |
| 815 |
break;
|
| 816 |
case INQUIRY:
|
| 817 |
buflen = scsi_disk_emulate_inquiry(req, outbuf); |
| 818 |
if (buflen < 0) |
| 819 |
goto illegal_request;
|
| 820 |
break;
|
| 821 |
case MODE_SENSE:
|
| 822 |
case MODE_SENSE_10:
|
| 823 |
buflen = scsi_disk_emulate_mode_sense(req, outbuf); |
| 824 |
if (buflen < 0) |
| 825 |
goto illegal_request;
|
| 826 |
break;
|
| 827 |
case READ_TOC:
|
| 828 |
buflen = scsi_disk_emulate_read_toc(req, outbuf); |
| 829 |
if (buflen < 0) |
| 830 |
goto illegal_request;
|
| 831 |
break;
|
| 832 |
case RESERVE:
|
| 833 |
if (req->cmd.buf[1] & 1) |
| 834 |
goto illegal_request;
|
| 835 |
break;
|
| 836 |
case RESERVE_10:
|
| 837 |
if (req->cmd.buf[1] & 3) |
| 838 |
goto illegal_request;
|
| 839 |
break;
|
| 840 |
case RELEASE:
|
| 841 |
if (req->cmd.buf[1] & 1) |
| 842 |
goto illegal_request;
|
| 843 |
break;
|
| 844 |
case RELEASE_10:
|
| 845 |
if (req->cmd.buf[1] & 3) |
| 846 |
goto illegal_request;
|
| 847 |
break;
|
| 848 |
case START_STOP:
|
| 849 |
if (bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM && (req->cmd.buf[4] & 2)) { |
| 850 |
/* load/eject medium */
|
| 851 |
bdrv_eject(s->bs, !(req->cmd.buf[4] & 1)); |
| 852 |
} |
| 853 |
break;
|
| 854 |
case ALLOW_MEDIUM_REMOVAL:
|
| 855 |
bdrv_set_locked(s->bs, req->cmd.buf[4] & 1); |
| 856 |
break;
|
| 857 |
case READ_CAPACITY:
|
| 858 |
/* The normal LEN field for this command is zero. */
|
| 859 |
memset(outbuf, 0, 8); |
| 860 |
bdrv_get_geometry(s->bs, &nb_sectors); |
| 861 |
if (!nb_sectors)
|
| 862 |
goto not_ready;
|
| 863 |
nb_sectors /= s->cluster_size; |
| 864 |
/* Returned value is the address of the last sector. */
|
| 865 |
nb_sectors--; |
| 866 |
/* Remember the new size for read/write sanity checking. */
|
| 867 |
s->max_lba = nb_sectors; |
| 868 |
/* Clip to 2TB, instead of returning capacity modulo 2TB. */
|
| 869 |
if (nb_sectors > UINT32_MAX)
|
| 870 |
nb_sectors = UINT32_MAX; |
| 871 |
outbuf[0] = (nb_sectors >> 24) & 0xff; |
| 872 |
outbuf[1] = (nb_sectors >> 16) & 0xff; |
| 873 |
outbuf[2] = (nb_sectors >> 8) & 0xff; |
| 874 |
outbuf[3] = nb_sectors & 0xff; |
| 875 |
outbuf[4] = 0; |
| 876 |
outbuf[5] = 0; |
| 877 |
outbuf[6] = s->cluster_size * 2; |
| 878 |
outbuf[7] = 0; |
| 879 |
buflen = 8;
|
| 880 |
break;
|
| 881 |
case SYNCHRONIZE_CACHE:
|
| 882 |
bdrv_flush(s->bs); |
| 883 |
break;
|
| 884 |
case GET_CONFIGURATION:
|
| 885 |
memset(outbuf, 0, 8); |
| 886 |
/* ??? This should probably return much more information. For now
|
| 887 |
just return the basic header indicating the CD-ROM profile. */
|
| 888 |
outbuf[7] = 8; // CD-ROM |
| 889 |
buflen = 8;
|
| 890 |
break;
|
| 891 |
case SERVICE_ACTION_IN:
|
| 892 |
/* Service Action In subcommands. */
|
| 893 |
if ((req->cmd.buf[1] & 31) == 0x10) { |
| 894 |
DPRINTF("SAI READ CAPACITY(16)\n");
|
| 895 |
memset(outbuf, 0, req->cmd.xfer);
|
| 896 |
bdrv_get_geometry(s->bs, &nb_sectors); |
| 897 |
if (!nb_sectors)
|
| 898 |
goto not_ready;
|
| 899 |
nb_sectors /= s->cluster_size; |
| 900 |
/* Returned value is the address of the last sector. */
|
| 901 |
nb_sectors--; |
| 902 |
/* Remember the new size for read/write sanity checking. */
|
| 903 |
s->max_lba = nb_sectors; |
| 904 |
outbuf[0] = (nb_sectors >> 56) & 0xff; |
| 905 |
outbuf[1] = (nb_sectors >> 48) & 0xff; |
| 906 |
outbuf[2] = (nb_sectors >> 40) & 0xff; |
| 907 |
outbuf[3] = (nb_sectors >> 32) & 0xff; |
| 908 |
outbuf[4] = (nb_sectors >> 24) & 0xff; |
| 909 |
outbuf[5] = (nb_sectors >> 16) & 0xff; |
| 910 |
outbuf[6] = (nb_sectors >> 8) & 0xff; |
| 911 |
outbuf[7] = nb_sectors & 0xff; |
| 912 |
outbuf[8] = 0; |
| 913 |
outbuf[9] = 0; |
| 914 |
outbuf[10] = s->cluster_size * 2; |
| 915 |
outbuf[11] = 0; |
| 916 |
outbuf[12] = 0; |
| 917 |
outbuf[13] = get_physical_block_exp(&s->qdev.conf);
|
| 918 |
/* Protection, exponent and lowest lba field left blank. */
|
| 919 |
buflen = req->cmd.xfer; |
| 920 |
break;
|
| 921 |
} |
| 922 |
DPRINTF("Unsupported Service Action In\n");
|
| 923 |
goto illegal_request;
|
| 924 |
case REPORT_LUNS:
|
| 925 |
if (req->cmd.xfer < 16) |
| 926 |
goto illegal_request;
|
| 927 |
memset(outbuf, 0, 16); |
| 928 |
outbuf[3] = 8; |
| 929 |
buflen = 16;
|
| 930 |
break;
|
| 931 |
case VERIFY:
|
| 932 |
break;
|
| 933 |
case REZERO_UNIT:
|
| 934 |
DPRINTF("Rezero Unit\n");
|
| 935 |
if (!bdrv_is_inserted(s->bs)) {
|
| 936 |
goto not_ready;
|
| 937 |
} |
| 938 |
break;
|
| 939 |
default:
|
| 940 |
goto illegal_request;
|
| 941 |
} |
| 942 |
scsi_req_set_status(req, GOOD, NO_SENSE); |
| 943 |
return buflen;
|
| 944 |
|
| 945 |
not_ready:
|
| 946 |
scsi_req_set_status(req, CHECK_CONDITION, NOT_READY); |
| 947 |
return 0; |
| 948 |
|
| 949 |
illegal_request:
|
| 950 |
scsi_req_set_status(req, CHECK_CONDITION, ILLEGAL_REQUEST); |
| 951 |
return 0; |
| 952 |
} |
| 953 |
|
| 954 |
/* Execute a scsi command. Returns the length of the data expected by the
|
| 955 |
command. This will be Positive for data transfers from the device
|
| 956 |
(eg. disk reads), negative for transfers to the device (eg. disk writes),
|
| 957 |
and zero if the command does not transfer any data. */
|
| 958 |
|
| 959 |
static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
|
| 960 |
uint8_t *buf, int lun)
|
| 961 |
{
|
| 962 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d); |
| 963 |
uint64_t lba; |
| 964 |
uint32_t len; |
| 965 |
int cmdlen;
|
| 966 |
int is_write;
|
| 967 |
uint8_t command; |
| 968 |
uint8_t *outbuf; |
| 969 |
SCSIDiskReq *r; |
| 970 |
int rc;
|
| 971 |
|
| 972 |
command = buf[0];
|
| 973 |
r = scsi_find_request(s, tag); |
| 974 |
if (r) {
|
| 975 |
BADF("Tag 0x%x already in use\n", tag);
|
| 976 |
scsi_cancel_io(d, tag); |
| 977 |
} |
| 978 |
/* ??? Tags are not unique for different luns. We only implement a
|
| 979 |
single lun, so this should not matter. */
|
| 980 |
r = scsi_new_request(s, tag, lun); |
| 981 |
outbuf = (uint8_t *)r->iov.iov_base; |
| 982 |
is_write = 0;
|
| 983 |
DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]); |
| 984 |
switch (command >> 5) { |
| 985 |
case 0: |
| 986 |
lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) | |
| 987 |
(((uint64_t) buf[1] & 0x1f) << 16); |
| 988 |
len = buf[4];
|
| 989 |
cmdlen = 6;
|
| 990 |
break;
|
| 991 |
case 1: |
| 992 |
case 2: |
| 993 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
| 994 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
| 995 |
len = buf[8] | (buf[7] << 8); |
| 996 |
cmdlen = 10;
|
| 997 |
break;
|
| 998 |
case 4: |
| 999 |
lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) | |
| 1000 |
((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) | |
| 1001 |
((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) | |
| 1002 |
((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56); |
| 1003 |
len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24); |
| 1004 |
cmdlen = 16;
|
| 1005 |
break;
|
| 1006 |
case 5: |
| 1007 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
| 1008 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
| 1009 |
len = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24); |
| 1010 |
cmdlen = 12;
|
| 1011 |
break;
|
| 1012 |
default:
|
| 1013 |
BADF("Unsupported command length, command %x\n", command);
|
| 1014 |
goto fail;
|
| 1015 |
} |
| 1016 |
#ifdef DEBUG_SCSI
|
| 1017 |
{
|
| 1018 |
int i;
|
| 1019 |
for (i = 1; i < cmdlen; i++) { |
| 1020 |
printf(" 0x%02x", buf[i]);
|
| 1021 |
} |
| 1022 |
printf("\n");
|
| 1023 |
} |
| 1024 |
#endif
|
| 1025 |
|
| 1026 |
if (scsi_req_parse(&r->req, buf) != 0) { |
| 1027 |
BADF("Unsupported command length, command %x\n", command);
|
| 1028 |
goto fail;
|
| 1029 |
} |
| 1030 |
assert(r->req.cmd.len == cmdlen); |
| 1031 |
assert(r->req.cmd.lba == lba); |
| 1032 |
|
| 1033 |
if (lun || buf[1] >> 5) { |
| 1034 |
/* Only LUN 0 supported. */
|
| 1035 |
DPRINTF("Unimplemented LUN %d\n", lun ? lun : buf[1] >> 5); |
| 1036 |
if (command != REQUEST_SENSE && command != INQUIRY)
|
| 1037 |
goto fail;
|
| 1038 |
} |
| 1039 |
switch (command) {
|
| 1040 |
case TEST_UNIT_READY:
|
| 1041 |
case REQUEST_SENSE:
|
| 1042 |
case INQUIRY:
|
| 1043 |
case MODE_SENSE:
|
| 1044 |
case MODE_SENSE_10:
|
| 1045 |
case RESERVE:
|
| 1046 |
case RESERVE_10:
|
| 1047 |
case RELEASE:
|
| 1048 |
case RELEASE_10:
|
| 1049 |
case START_STOP:
|
| 1050 |
case ALLOW_MEDIUM_REMOVAL:
|
| 1051 |
case READ_CAPACITY:
|
| 1052 |
case SYNCHRONIZE_CACHE:
|
| 1053 |
case READ_TOC:
|
| 1054 |
case GET_CONFIGURATION:
|
| 1055 |
case SERVICE_ACTION_IN:
|
| 1056 |
case REPORT_LUNS:
|
| 1057 |
case VERIFY:
|
| 1058 |
case REZERO_UNIT:
|
| 1059 |
rc = scsi_disk_emulate_command(&r->req, outbuf); |
| 1060 |
if (rc > 0) { |
| 1061 |
r->iov.iov_len = rc; |
| 1062 |
} else {
|
| 1063 |
scsi_req_complete(&r->req); |
| 1064 |
scsi_remove_request(r); |
| 1065 |
return 0; |
| 1066 |
} |
| 1067 |
break;
|
| 1068 |
case READ_6:
|
| 1069 |
case READ_10:
|
| 1070 |
case READ_12:
|
| 1071 |
case READ_16:
|
| 1072 |
DPRINTF("Read (sector %" PRId64 ", count %d)\n", lba, len); |
| 1073 |
if (lba > s->max_lba)
|
| 1074 |
goto illegal_lba;
|
| 1075 |
r->sector = lba * s->cluster_size; |
| 1076 |
r->sector_count = len * s->cluster_size; |
| 1077 |
break;
|
| 1078 |
case WRITE_6:
|
| 1079 |
case WRITE_10:
|
| 1080 |
case WRITE_12:
|
| 1081 |
case WRITE_16:
|
| 1082 |
case WRITE_VERIFY:
|
| 1083 |
case WRITE_VERIFY_12:
|
| 1084 |
case WRITE_VERIFY_16:
|
| 1085 |
DPRINTF("Write %s(sector %" PRId64 ", count %d)\n", |
| 1086 |
(command & 0xe) == 0xe ? "And Verify " : "", lba, len); |
| 1087 |
if (lba > s->max_lba)
|
| 1088 |
goto illegal_lba;
|
| 1089 |
r->sector = lba * s->cluster_size; |
| 1090 |
r->sector_count = len * s->cluster_size; |
| 1091 |
is_write = 1;
|
| 1092 |
break;
|
| 1093 |
case MODE_SELECT:
|
| 1094 |
DPRINTF("Mode Select(6) (len %d)\n", len);
|
| 1095 |
/* We don't support mode parameter changes.
|
| 1096 |
Allow the mode parameter header + block descriptors only. */
|
| 1097 |
if (len > 12) { |
| 1098 |
goto fail;
|
| 1099 |
} |
| 1100 |
break;
|
| 1101 |
case MODE_SELECT_10:
|
| 1102 |
DPRINTF("Mode Select(10) (len %d)\n", len);
|
| 1103 |
/* We don't support mode parameter changes.
|
| 1104 |
Allow the mode parameter header + block descriptors only. */
|
| 1105 |
if (len > 16) { |
| 1106 |
goto fail;
|
| 1107 |
} |
| 1108 |
break;
|
| 1109 |
case SEEK_6:
|
| 1110 |
case SEEK_10:
|
| 1111 |
DPRINTF("Seek(%d) (sector %" PRId64 ")\n", command == SEEK_6 ? 6 : 10, lba); |
| 1112 |
if (lba > s->max_lba) {
|
| 1113 |
goto illegal_lba;
|
| 1114 |
} |
| 1115 |
break;
|
| 1116 |
default:
|
| 1117 |
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]); |
| 1118 |
fail:
|
| 1119 |
scsi_command_complete(r, CHECK_CONDITION, ILLEGAL_REQUEST); |
| 1120 |
return 0; |
| 1121 |
illegal_lba:
|
| 1122 |
scsi_command_complete(r, CHECK_CONDITION, HARDWARE_ERROR); |
| 1123 |
return 0; |
| 1124 |
} |
| 1125 |
if (r->sector_count == 0 && r->iov.iov_len == 0) { |
| 1126 |
scsi_command_complete(r, GOOD, NO_SENSE); |
| 1127 |
} |
| 1128 |
len = r->sector_count * 512 + r->iov.iov_len;
|
| 1129 |
if (is_write) {
|
| 1130 |
return -len;
|
| 1131 |
} else {
|
| 1132 |
if (!r->sector_count)
|
| 1133 |
r->sector_count = -1;
|
| 1134 |
return len;
|
| 1135 |
} |
| 1136 |
} |
| 1137 |
|
| 1138 |
static void scsi_disk_purge_requests(SCSIDiskState *s) |
| 1139 |
{
|
| 1140 |
SCSIDiskReq *r; |
| 1141 |
|
| 1142 |
while (!QTAILQ_EMPTY(&s->qdev.requests)) {
|
| 1143 |
r = DO_UPCAST(SCSIDiskReq, req, QTAILQ_FIRST(&s->qdev.requests)); |
| 1144 |
if (r->req.aiocb) {
|
| 1145 |
bdrv_aio_cancel(r->req.aiocb); |
| 1146 |
} |
| 1147 |
scsi_remove_request(r); |
| 1148 |
} |
| 1149 |
} |
| 1150 |
|
| 1151 |
static void scsi_disk_reset(DeviceState *dev) |
| 1152 |
{
|
| 1153 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev); |
| 1154 |
uint64_t nb_sectors; |
| 1155 |
|
| 1156 |
scsi_disk_purge_requests(s); |
| 1157 |
|
| 1158 |
bdrv_get_geometry(s->bs, &nb_sectors); |
| 1159 |
nb_sectors /= s->cluster_size; |
| 1160 |
if (nb_sectors) {
|
| 1161 |
nb_sectors--; |
| 1162 |
} |
| 1163 |
s->max_lba = nb_sectors; |
| 1164 |
} |
| 1165 |
|
| 1166 |
static void scsi_destroy(SCSIDevice *dev) |
| 1167 |
{
|
| 1168 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
| 1169 |
|
| 1170 |
scsi_disk_purge_requests(s); |
| 1171 |
blockdev_mark_auto_del(s->qdev.conf.bs); |
| 1172 |
} |
| 1173 |
|
| 1174 |
static int scsi_disk_initfn(SCSIDevice *dev) |
| 1175 |
{
|
| 1176 |
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev); |
| 1177 |
int is_cd;
|
| 1178 |
DriveInfo *dinfo; |
| 1179 |
|
| 1180 |
if (!s->qdev.conf.bs) {
|
| 1181 |
error_report("scsi-disk: drive property not set");
|
| 1182 |
return -1; |
| 1183 |
} |
| 1184 |
s->bs = s->qdev.conf.bs; |
| 1185 |
is_cd = bdrv_get_type_hint(s->bs) == BDRV_TYPE_CDROM; |
| 1186 |
|
| 1187 |
if (!is_cd && !bdrv_is_inserted(s->bs)) {
|
| 1188 |
error_report("Device needs media, but drive is empty");
|
| 1189 |
return -1; |
| 1190 |
} |
| 1191 |
|
| 1192 |
if (!s->serial) {
|
| 1193 |
/* try to fall back to value set with legacy -drive serial=... */
|
| 1194 |
dinfo = drive_get_by_blockdev(s->bs); |
| 1195 |
s->serial = qemu_strdup(*dinfo->serial ? dinfo->serial : "0");
|
| 1196 |
} |
| 1197 |
|
| 1198 |
if (!s->version) {
|
| 1199 |
s->version = qemu_strdup(QEMU_VERSION); |
| 1200 |
} |
| 1201 |
|
| 1202 |
if (bdrv_is_sg(s->bs)) {
|
| 1203 |
error_report("scsi-disk: unwanted /dev/sg*");
|
| 1204 |
return -1; |
| 1205 |
} |
| 1206 |
|
| 1207 |
if (is_cd) {
|
| 1208 |
s->qdev.blocksize = 2048;
|
| 1209 |
} else {
|
| 1210 |
s->qdev.blocksize = s->qdev.conf.logical_block_size; |
| 1211 |
} |
| 1212 |
s->cluster_size = s->qdev.blocksize / 512;
|
| 1213 |
s->bs->buffer_alignment = s->qdev.blocksize; |
| 1214 |
|
| 1215 |
s->qdev.type = TYPE_DISK; |
| 1216 |
qemu_add_vm_change_state_handler(scsi_dma_restart_cb, s); |
| 1217 |
bdrv_set_removable(s->bs, is_cd); |
| 1218 |
return 0; |
| 1219 |
} |
| 1220 |
|
| 1221 |
static SCSIDeviceInfo scsi_disk_info = {
|
| 1222 |
.qdev.name = "scsi-disk",
|
| 1223 |
.qdev.desc = "virtual scsi disk or cdrom",
|
| 1224 |
.qdev.size = sizeof(SCSIDiskState),
|
| 1225 |
.qdev.reset = scsi_disk_reset, |
| 1226 |
.init = scsi_disk_initfn, |
| 1227 |
.destroy = scsi_destroy, |
| 1228 |
.send_command = scsi_send_command, |
| 1229 |
.read_data = scsi_read_data, |
| 1230 |
.write_data = scsi_write_data, |
| 1231 |
.cancel_io = scsi_cancel_io, |
| 1232 |
.get_buf = scsi_get_buf, |
| 1233 |
.qdev.props = (Property[]) {
|
| 1234 |
DEFINE_BLOCK_PROPERTIES(SCSIDiskState, qdev.conf), |
| 1235 |
DEFINE_PROP_STRING("ver", SCSIDiskState, version),
|
| 1236 |
DEFINE_PROP_STRING("serial", SCSIDiskState, serial),
|
| 1237 |
DEFINE_PROP_END_OF_LIST(), |
| 1238 |
}, |
| 1239 |
}; |
| 1240 |
|
| 1241 |
static void scsi_disk_register_devices(void) |
| 1242 |
{
|
| 1243 |
scsi_qdev_register(&scsi_disk_info); |
| 1244 |
} |
| 1245 |
device_init(scsi_disk_register_devices) |