root / hw / scsi / scsi-bus.c @ cac3c384
History | View | Annotate | Download (53.3 kB)
| 1 |
#include "hw/hw.h" |
|---|---|
| 2 |
#include "qemu/error-report.h" |
| 3 |
#include "hw/scsi/scsi.h" |
| 4 |
#include "block/scsi.h" |
| 5 |
#include "hw/qdev.h" |
| 6 |
#include "sysemu/blockdev.h" |
| 7 |
#include "trace.h" |
| 8 |
#include "sysemu/dma.h" |
| 9 |
|
| 10 |
static char *scsibus_get_dev_path(DeviceState *dev); |
| 11 |
static char *scsibus_get_fw_dev_path(DeviceState *dev); |
| 12 |
static int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf); |
| 13 |
static void scsi_req_dequeue(SCSIRequest *req); |
| 14 |
|
| 15 |
static Property scsi_props[] = {
|
| 16 |
DEFINE_PROP_UINT32("channel", SCSIDevice, channel, 0), |
| 17 |
DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1), |
| 18 |
DEFINE_PROP_UINT32("lun", SCSIDevice, lun, -1), |
| 19 |
DEFINE_PROP_END_OF_LIST(), |
| 20 |
}; |
| 21 |
|
| 22 |
static void scsi_bus_class_init(ObjectClass *klass, void *data) |
| 23 |
{
|
| 24 |
BusClass *k = BUS_CLASS(klass); |
| 25 |
|
| 26 |
k->get_dev_path = scsibus_get_dev_path; |
| 27 |
k->get_fw_dev_path = scsibus_get_fw_dev_path; |
| 28 |
} |
| 29 |
|
| 30 |
static const TypeInfo scsi_bus_info = { |
| 31 |
.name = TYPE_SCSI_BUS, |
| 32 |
.parent = TYPE_BUS, |
| 33 |
.instance_size = sizeof(SCSIBus),
|
| 34 |
.class_init = scsi_bus_class_init, |
| 35 |
}; |
| 36 |
static int next_scsi_bus; |
| 37 |
|
| 38 |
static int scsi_device_init(SCSIDevice *s) |
| 39 |
{
|
| 40 |
SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); |
| 41 |
if (sc->init) {
|
| 42 |
return sc->init(s);
|
| 43 |
} |
| 44 |
return 0; |
| 45 |
} |
| 46 |
|
| 47 |
static void scsi_device_destroy(SCSIDevice *s) |
| 48 |
{
|
| 49 |
SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); |
| 50 |
if (sc->destroy) {
|
| 51 |
sc->destroy(s); |
| 52 |
} |
| 53 |
} |
| 54 |
|
| 55 |
static SCSIRequest *scsi_device_alloc_req(SCSIDevice *s, uint32_t tag, uint32_t lun,
|
| 56 |
uint8_t *buf, void *hba_private)
|
| 57 |
{
|
| 58 |
SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); |
| 59 |
if (sc->alloc_req) {
|
| 60 |
return sc->alloc_req(s, tag, lun, buf, hba_private);
|
| 61 |
} |
| 62 |
|
| 63 |
return NULL; |
| 64 |
} |
| 65 |
|
| 66 |
static void scsi_device_unit_attention_reported(SCSIDevice *s) |
| 67 |
{
|
| 68 |
SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s); |
| 69 |
if (sc->unit_attention_reported) {
|
| 70 |
sc->unit_attention_reported(s); |
| 71 |
} |
| 72 |
} |
| 73 |
|
| 74 |
/* Create a scsi bus, and attach devices to it. */
|
| 75 |
void scsi_bus_new(SCSIBus *bus, DeviceState *host, const SCSIBusInfo *info, |
| 76 |
const char *bus_name) |
| 77 |
{
|
| 78 |
qbus_create_inplace(&bus->qbus, TYPE_SCSI_BUS, host, bus_name); |
| 79 |
bus->busnr = next_scsi_bus++; |
| 80 |
bus->info = info; |
| 81 |
bus->qbus.allow_hotplug = 1;
|
| 82 |
} |
| 83 |
|
| 84 |
static void scsi_dma_restart_bh(void *opaque) |
| 85 |
{
|
| 86 |
SCSIDevice *s = opaque; |
| 87 |
SCSIRequest *req, *next; |
| 88 |
|
| 89 |
qemu_bh_delete(s->bh); |
| 90 |
s->bh = NULL;
|
| 91 |
|
| 92 |
QTAILQ_FOREACH_SAFE(req, &s->requests, next, next) {
|
| 93 |
scsi_req_ref(req); |
| 94 |
if (req->retry) {
|
| 95 |
req->retry = false;
|
| 96 |
switch (req->cmd.mode) {
|
| 97 |
case SCSI_XFER_FROM_DEV:
|
| 98 |
case SCSI_XFER_TO_DEV:
|
| 99 |
scsi_req_continue(req); |
| 100 |
break;
|
| 101 |
case SCSI_XFER_NONE:
|
| 102 |
assert(!req->sg); |
| 103 |
scsi_req_dequeue(req); |
| 104 |
scsi_req_enqueue(req); |
| 105 |
break;
|
| 106 |
} |
| 107 |
} |
| 108 |
scsi_req_unref(req); |
| 109 |
} |
| 110 |
} |
| 111 |
|
| 112 |
void scsi_req_retry(SCSIRequest *req)
|
| 113 |
{
|
| 114 |
/* No need to save a reference, because scsi_dma_restart_bh just
|
| 115 |
* looks at the request list. */
|
| 116 |
req->retry = true;
|
| 117 |
} |
| 118 |
|
| 119 |
static void scsi_dma_restart_cb(void *opaque, int running, RunState state) |
| 120 |
{
|
| 121 |
SCSIDevice *s = opaque; |
| 122 |
|
| 123 |
if (!running) {
|
| 124 |
return;
|
| 125 |
} |
| 126 |
if (!s->bh) {
|
| 127 |
s->bh = qemu_bh_new(scsi_dma_restart_bh, s); |
| 128 |
qemu_bh_schedule(s->bh); |
| 129 |
} |
| 130 |
} |
| 131 |
|
| 132 |
static int scsi_qdev_init(DeviceState *qdev) |
| 133 |
{
|
| 134 |
SCSIDevice *dev = SCSI_DEVICE(qdev); |
| 135 |
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); |
| 136 |
SCSIDevice *d; |
| 137 |
int rc = -1; |
| 138 |
|
| 139 |
if (dev->channel > bus->info->max_channel) {
|
| 140 |
error_report("bad scsi channel id: %d", dev->channel);
|
| 141 |
goto err;
|
| 142 |
} |
| 143 |
if (dev->id != -1 && dev->id > bus->info->max_target) { |
| 144 |
error_report("bad scsi device id: %d", dev->id);
|
| 145 |
goto err;
|
| 146 |
} |
| 147 |
if (dev->lun != -1 && dev->lun > bus->info->max_lun) { |
| 148 |
error_report("bad scsi device lun: %d", dev->lun);
|
| 149 |
goto err;
|
| 150 |
} |
| 151 |
|
| 152 |
if (dev->id == -1) { |
| 153 |
int id = -1; |
| 154 |
if (dev->lun == -1) { |
| 155 |
dev->lun = 0;
|
| 156 |
} |
| 157 |
do {
|
| 158 |
d = scsi_device_find(bus, dev->channel, ++id, dev->lun); |
| 159 |
} while (d && d->lun == dev->lun && id < bus->info->max_target);
|
| 160 |
if (d && d->lun == dev->lun) {
|
| 161 |
error_report("no free target");
|
| 162 |
goto err;
|
| 163 |
} |
| 164 |
dev->id = id; |
| 165 |
} else if (dev->lun == -1) { |
| 166 |
int lun = -1; |
| 167 |
do {
|
| 168 |
d = scsi_device_find(bus, dev->channel, dev->id, ++lun); |
| 169 |
} while (d && d->lun == lun && lun < bus->info->max_lun);
|
| 170 |
if (d && d->lun == lun) {
|
| 171 |
error_report("no free lun");
|
| 172 |
goto err;
|
| 173 |
} |
| 174 |
dev->lun = lun; |
| 175 |
} else {
|
| 176 |
d = scsi_device_find(bus, dev->channel, dev->id, dev->lun); |
| 177 |
assert(d); |
| 178 |
if (d->lun == dev->lun && dev != d) {
|
| 179 |
qdev_free(&d->qdev); |
| 180 |
} |
| 181 |
} |
| 182 |
|
| 183 |
QTAILQ_INIT(&dev->requests); |
| 184 |
rc = scsi_device_init(dev); |
| 185 |
if (rc == 0) { |
| 186 |
dev->vmsentry = qemu_add_vm_change_state_handler(scsi_dma_restart_cb, |
| 187 |
dev); |
| 188 |
} |
| 189 |
|
| 190 |
if (bus->info->hotplug) {
|
| 191 |
bus->info->hotplug(bus, dev); |
| 192 |
} |
| 193 |
|
| 194 |
err:
|
| 195 |
return rc;
|
| 196 |
} |
| 197 |
|
| 198 |
static int scsi_qdev_exit(DeviceState *qdev) |
| 199 |
{
|
| 200 |
SCSIDevice *dev = SCSI_DEVICE(qdev); |
| 201 |
|
| 202 |
if (dev->vmsentry) {
|
| 203 |
qemu_del_vm_change_state_handler(dev->vmsentry); |
| 204 |
} |
| 205 |
scsi_device_destroy(dev); |
| 206 |
return 0; |
| 207 |
} |
| 208 |
|
| 209 |
/* handle legacy '-drive if=scsi,...' cmd line args */
|
| 210 |
SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv, |
| 211 |
int unit, bool removable, int bootindex, |
| 212 |
const char *serial) |
| 213 |
{
|
| 214 |
const char *driver; |
| 215 |
DeviceState *dev; |
| 216 |
|
| 217 |
driver = bdrv_is_sg(bdrv) ? "scsi-generic" : "scsi-disk"; |
| 218 |
dev = qdev_create(&bus->qbus, driver); |
| 219 |
qdev_prop_set_uint32(dev, "scsi-id", unit);
|
| 220 |
if (bootindex >= 0) { |
| 221 |
qdev_prop_set_int32(dev, "bootindex", bootindex);
|
| 222 |
} |
| 223 |
if (object_property_find(OBJECT(dev), "removable", NULL)) { |
| 224 |
qdev_prop_set_bit(dev, "removable", removable);
|
| 225 |
} |
| 226 |
if (serial) {
|
| 227 |
qdev_prop_set_string(dev, "serial", serial);
|
| 228 |
} |
| 229 |
if (qdev_prop_set_drive(dev, "drive", bdrv) < 0) { |
| 230 |
qdev_free(dev); |
| 231 |
return NULL; |
| 232 |
} |
| 233 |
if (qdev_init(dev) < 0) |
| 234 |
return NULL; |
| 235 |
return SCSI_DEVICE(dev);
|
| 236 |
} |
| 237 |
|
| 238 |
int scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
|
| 239 |
{
|
| 240 |
Location loc; |
| 241 |
DriveInfo *dinfo; |
| 242 |
int res = 0, unit; |
| 243 |
|
| 244 |
loc_push_none(&loc); |
| 245 |
for (unit = 0; unit <= bus->info->max_target; unit++) { |
| 246 |
dinfo = drive_get(IF_SCSI, bus->busnr, unit); |
| 247 |
if (dinfo == NULL) { |
| 248 |
continue;
|
| 249 |
} |
| 250 |
qemu_opts_loc_restore(dinfo->opts); |
| 251 |
if (!scsi_bus_legacy_add_drive(bus, dinfo->bdrv, unit, false, -1, NULL)) { |
| 252 |
res = -1;
|
| 253 |
break;
|
| 254 |
} |
| 255 |
} |
| 256 |
loc_pop(&loc); |
| 257 |
return res;
|
| 258 |
} |
| 259 |
|
| 260 |
static int32_t scsi_invalid_field(SCSIRequest *req, uint8_t *buf)
|
| 261 |
{
|
| 262 |
scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD)); |
| 263 |
scsi_req_complete(req, CHECK_CONDITION); |
| 264 |
return 0; |
| 265 |
} |
| 266 |
|
| 267 |
static const struct SCSIReqOps reqops_invalid_field = { |
| 268 |
.size = sizeof(SCSIRequest),
|
| 269 |
.send_command = scsi_invalid_field |
| 270 |
}; |
| 271 |
|
| 272 |
/* SCSIReqOps implementation for invalid commands. */
|
| 273 |
|
| 274 |
static int32_t scsi_invalid_command(SCSIRequest *req, uint8_t *buf)
|
| 275 |
{
|
| 276 |
scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE)); |
| 277 |
scsi_req_complete(req, CHECK_CONDITION); |
| 278 |
return 0; |
| 279 |
} |
| 280 |
|
| 281 |
static const struct SCSIReqOps reqops_invalid_opcode = { |
| 282 |
.size = sizeof(SCSIRequest),
|
| 283 |
.send_command = scsi_invalid_command |
| 284 |
}; |
| 285 |
|
| 286 |
/* SCSIReqOps implementation for unit attention conditions. */
|
| 287 |
|
| 288 |
static int32_t scsi_unit_attention(SCSIRequest *req, uint8_t *buf)
|
| 289 |
{
|
| 290 |
if (req->dev->unit_attention.key == UNIT_ATTENTION) {
|
| 291 |
scsi_req_build_sense(req, req->dev->unit_attention); |
| 292 |
} else if (req->bus->unit_attention.key == UNIT_ATTENTION) { |
| 293 |
scsi_req_build_sense(req, req->bus->unit_attention); |
| 294 |
} |
| 295 |
scsi_req_complete(req, CHECK_CONDITION); |
| 296 |
return 0; |
| 297 |
} |
| 298 |
|
| 299 |
static const struct SCSIReqOps reqops_unit_attention = { |
| 300 |
.size = sizeof(SCSIRequest),
|
| 301 |
.send_command = scsi_unit_attention |
| 302 |
}; |
| 303 |
|
| 304 |
/* SCSIReqOps implementation for REPORT LUNS and for commands sent to
|
| 305 |
an invalid LUN. */
|
| 306 |
|
| 307 |
typedef struct SCSITargetReq SCSITargetReq; |
| 308 |
|
| 309 |
struct SCSITargetReq {
|
| 310 |
SCSIRequest req; |
| 311 |
int len;
|
| 312 |
uint8_t buf[2056];
|
| 313 |
}; |
| 314 |
|
| 315 |
static void store_lun(uint8_t *outbuf, int lun) |
| 316 |
{
|
| 317 |
if (lun < 256) { |
| 318 |
outbuf[1] = lun;
|
| 319 |
return;
|
| 320 |
} |
| 321 |
outbuf[1] = (lun & 255); |
| 322 |
outbuf[0] = (lun >> 8) | 0x40; |
| 323 |
} |
| 324 |
|
| 325 |
static bool scsi_target_emulate_report_luns(SCSITargetReq *r) |
| 326 |
{
|
| 327 |
BusChild *kid; |
| 328 |
int i, len, n;
|
| 329 |
int channel, id;
|
| 330 |
bool found_lun0;
|
| 331 |
|
| 332 |
if (r->req.cmd.xfer < 16) { |
| 333 |
return false; |
| 334 |
} |
| 335 |
if (r->req.cmd.buf[2] > 2) { |
| 336 |
return false; |
| 337 |
} |
| 338 |
channel = r->req.dev->channel; |
| 339 |
id = r->req.dev->id; |
| 340 |
found_lun0 = false;
|
| 341 |
n = 0;
|
| 342 |
QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) {
|
| 343 |
DeviceState *qdev = kid->child; |
| 344 |
SCSIDevice *dev = SCSI_DEVICE(qdev); |
| 345 |
|
| 346 |
if (dev->channel == channel && dev->id == id) {
|
| 347 |
if (dev->lun == 0) { |
| 348 |
found_lun0 = true;
|
| 349 |
} |
| 350 |
n += 8;
|
| 351 |
} |
| 352 |
} |
| 353 |
if (!found_lun0) {
|
| 354 |
n += 8;
|
| 355 |
} |
| 356 |
len = MIN(n + 8, r->req.cmd.xfer & ~7); |
| 357 |
if (len > sizeof(r->buf)) { |
| 358 |
/* TODO: > 256 LUNs? */
|
| 359 |
return false; |
| 360 |
} |
| 361 |
|
| 362 |
memset(r->buf, 0, len);
|
| 363 |
stl_be_p(&r->buf, n); |
| 364 |
i = found_lun0 ? 8 : 16; |
| 365 |
QTAILQ_FOREACH(kid, &r->req.bus->qbus.children, sibling) {
|
| 366 |
DeviceState *qdev = kid->child; |
| 367 |
SCSIDevice *dev = SCSI_DEVICE(qdev); |
| 368 |
|
| 369 |
if (dev->channel == channel && dev->id == id) {
|
| 370 |
store_lun(&r->buf[i], dev->lun); |
| 371 |
i += 8;
|
| 372 |
} |
| 373 |
} |
| 374 |
assert(i == n + 8);
|
| 375 |
r->len = len; |
| 376 |
return true; |
| 377 |
} |
| 378 |
|
| 379 |
static bool scsi_target_emulate_inquiry(SCSITargetReq *r) |
| 380 |
{
|
| 381 |
assert(r->req.dev->lun != r->req.lun); |
| 382 |
if (r->req.cmd.buf[1] & 0x2) { |
| 383 |
/* Command support data - optional, not implemented */
|
| 384 |
return false; |
| 385 |
} |
| 386 |
|
| 387 |
if (r->req.cmd.buf[1] & 0x1) { |
| 388 |
/* Vital product data */
|
| 389 |
uint8_t page_code = r->req.cmd.buf[2];
|
| 390 |
r->buf[r->len++] = page_code ; /* this page */
|
| 391 |
r->buf[r->len++] = 0x00;
|
| 392 |
|
| 393 |
switch (page_code) {
|
| 394 |
case 0x00: /* Supported page codes, mandatory */ |
| 395 |
{
|
| 396 |
int pages;
|
| 397 |
pages = r->len++; |
| 398 |
r->buf[r->len++] = 0x00; /* list of supported pages (this page) */ |
| 399 |
r->buf[pages] = r->len - pages - 1; /* number of pages */ |
| 400 |
break;
|
| 401 |
} |
| 402 |
default:
|
| 403 |
return false; |
| 404 |
} |
| 405 |
/* done with EVPD */
|
| 406 |
assert(r->len < sizeof(r->buf));
|
| 407 |
r->len = MIN(r->req.cmd.xfer, r->len); |
| 408 |
return true; |
| 409 |
} |
| 410 |
|
| 411 |
/* Standard INQUIRY data */
|
| 412 |
if (r->req.cmd.buf[2] != 0) { |
| 413 |
return false; |
| 414 |
} |
| 415 |
|
| 416 |
/* PAGE CODE == 0 */
|
| 417 |
r->len = MIN(r->req.cmd.xfer, 36);
|
| 418 |
memset(r->buf, 0, r->len);
|
| 419 |
if (r->req.lun != 0) { |
| 420 |
r->buf[0] = TYPE_NO_LUN;
|
| 421 |
} else {
|
| 422 |
r->buf[0] = TYPE_NOT_PRESENT | TYPE_INACTIVE;
|
| 423 |
r->buf[2] = 5; /* Version */ |
| 424 |
r->buf[3] = 2 | 0x10; /* HiSup, response data format */ |
| 425 |
r->buf[4] = r->len - 5; /* Additional Length = (Len - 1) - 4 */ |
| 426 |
r->buf[7] = 0x10 | (r->req.bus->info->tcq ? 0x02 : 0); /* Sync, TCQ. */ |
| 427 |
memcpy(&r->buf[8], "QEMU ", 8); |
| 428 |
memcpy(&r->buf[16], "QEMU TARGET ", 16); |
| 429 |
pstrcpy((char *) &r->buf[32], 4, qemu_get_version()); |
| 430 |
} |
| 431 |
return true; |
| 432 |
} |
| 433 |
|
| 434 |
static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf)
|
| 435 |
{
|
| 436 |
SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); |
| 437 |
|
| 438 |
switch (buf[0]) { |
| 439 |
case REPORT_LUNS:
|
| 440 |
if (!scsi_target_emulate_report_luns(r)) {
|
| 441 |
goto illegal_request;
|
| 442 |
} |
| 443 |
break;
|
| 444 |
case INQUIRY:
|
| 445 |
if (!scsi_target_emulate_inquiry(r)) {
|
| 446 |
goto illegal_request;
|
| 447 |
} |
| 448 |
break;
|
| 449 |
case REQUEST_SENSE:
|
| 450 |
r->len = scsi_device_get_sense(r->req.dev, r->buf, |
| 451 |
MIN(req->cmd.xfer, sizeof r->buf),
|
| 452 |
(req->cmd.buf[1] & 1) == 0); |
| 453 |
if (r->req.dev->sense_is_ua) {
|
| 454 |
scsi_device_unit_attention_reported(req->dev); |
| 455 |
r->req.dev->sense_len = 0;
|
| 456 |
r->req.dev->sense_is_ua = false;
|
| 457 |
} |
| 458 |
break;
|
| 459 |
default:
|
| 460 |
scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED)); |
| 461 |
scsi_req_complete(req, CHECK_CONDITION); |
| 462 |
return 0; |
| 463 |
illegal_request:
|
| 464 |
scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD)); |
| 465 |
scsi_req_complete(req, CHECK_CONDITION); |
| 466 |
return 0; |
| 467 |
} |
| 468 |
|
| 469 |
if (!r->len) {
|
| 470 |
scsi_req_complete(req, GOOD); |
| 471 |
} |
| 472 |
return r->len;
|
| 473 |
} |
| 474 |
|
| 475 |
static void scsi_target_read_data(SCSIRequest *req) |
| 476 |
{
|
| 477 |
SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); |
| 478 |
uint32_t n; |
| 479 |
|
| 480 |
n = r->len; |
| 481 |
if (n > 0) { |
| 482 |
r->len = 0;
|
| 483 |
scsi_req_data(&r->req, n); |
| 484 |
} else {
|
| 485 |
scsi_req_complete(&r->req, GOOD); |
| 486 |
} |
| 487 |
} |
| 488 |
|
| 489 |
static uint8_t *scsi_target_get_buf(SCSIRequest *req)
|
| 490 |
{
|
| 491 |
SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req); |
| 492 |
|
| 493 |
return r->buf;
|
| 494 |
} |
| 495 |
|
| 496 |
static const struct SCSIReqOps reqops_target_command = { |
| 497 |
.size = sizeof(SCSITargetReq),
|
| 498 |
.send_command = scsi_target_send_command, |
| 499 |
.read_data = scsi_target_read_data, |
| 500 |
.get_buf = scsi_target_get_buf, |
| 501 |
}; |
| 502 |
|
| 503 |
|
| 504 |
SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
|
| 505 |
uint32_t tag, uint32_t lun, void *hba_private)
|
| 506 |
{
|
| 507 |
SCSIRequest *req; |
| 508 |
SCSIBus *bus = scsi_bus_from_device(d); |
| 509 |
BusState *qbus = BUS(bus); |
| 510 |
|
| 511 |
req = g_malloc0(reqops->size); |
| 512 |
req->refcount = 1;
|
| 513 |
req->bus = bus; |
| 514 |
req->dev = d; |
| 515 |
req->tag = tag; |
| 516 |
req->lun = lun; |
| 517 |
req->hba_private = hba_private; |
| 518 |
req->status = -1;
|
| 519 |
req->sense_len = 0;
|
| 520 |
req->ops = reqops; |
| 521 |
object_ref(OBJECT(d)); |
| 522 |
object_ref(OBJECT(qbus->parent)); |
| 523 |
trace_scsi_req_alloc(req->dev->id, req->lun, req->tag); |
| 524 |
return req;
|
| 525 |
} |
| 526 |
|
| 527 |
SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun, |
| 528 |
uint8_t *buf, void *hba_private)
|
| 529 |
{
|
| 530 |
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus); |
| 531 |
SCSIRequest *req; |
| 532 |
SCSICommand cmd; |
| 533 |
|
| 534 |
if (scsi_req_parse(&cmd, d, buf) != 0) { |
| 535 |
trace_scsi_req_parse_bad(d->id, lun, tag, buf[0]);
|
| 536 |
req = scsi_req_alloc(&reqops_invalid_opcode, d, tag, lun, hba_private); |
| 537 |
} else {
|
| 538 |
trace_scsi_req_parsed(d->id, lun, tag, buf[0],
|
| 539 |
cmd.mode, cmd.xfer); |
| 540 |
if (cmd.lba != -1) { |
| 541 |
trace_scsi_req_parsed_lba(d->id, lun, tag, buf[0],
|
| 542 |
cmd.lba); |
| 543 |
} |
| 544 |
|
| 545 |
if (cmd.xfer > INT32_MAX) {
|
| 546 |
req = scsi_req_alloc(&reqops_invalid_field, d, tag, lun, hba_private); |
| 547 |
} else if ((d->unit_attention.key == UNIT_ATTENTION || |
| 548 |
bus->unit_attention.key == UNIT_ATTENTION) && |
| 549 |
(buf[0] != INQUIRY &&
|
| 550 |
buf[0] != REPORT_LUNS &&
|
| 551 |
buf[0] != GET_CONFIGURATION &&
|
| 552 |
buf[0] != GET_EVENT_STATUS_NOTIFICATION &&
|
| 553 |
|
| 554 |
/*
|
| 555 |
* If we already have a pending unit attention condition,
|
| 556 |
* report this one before triggering another one.
|
| 557 |
*/
|
| 558 |
!(buf[0] == REQUEST_SENSE && d->sense_is_ua))) {
|
| 559 |
req = scsi_req_alloc(&reqops_unit_attention, d, tag, lun, |
| 560 |
hba_private); |
| 561 |
} else if (lun != d->lun || |
| 562 |
buf[0] == REPORT_LUNS ||
|
| 563 |
(buf[0] == REQUEST_SENSE && d->sense_len)) {
|
| 564 |
req = scsi_req_alloc(&reqops_target_command, d, tag, lun, |
| 565 |
hba_private); |
| 566 |
} else {
|
| 567 |
req = scsi_device_alloc_req(d, tag, lun, buf, hba_private); |
| 568 |
} |
| 569 |
} |
| 570 |
|
| 571 |
req->cmd = cmd; |
| 572 |
req->resid = req->cmd.xfer; |
| 573 |
|
| 574 |
switch (buf[0]) { |
| 575 |
case INQUIRY:
|
| 576 |
trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]); |
| 577 |
break;
|
| 578 |
case TEST_UNIT_READY:
|
| 579 |
trace_scsi_test_unit_ready(d->id, lun, tag); |
| 580 |
break;
|
| 581 |
case REPORT_LUNS:
|
| 582 |
trace_scsi_report_luns(d->id, lun, tag); |
| 583 |
break;
|
| 584 |
case REQUEST_SENSE:
|
| 585 |
trace_scsi_request_sense(d->id, lun, tag); |
| 586 |
break;
|
| 587 |
default:
|
| 588 |
break;
|
| 589 |
} |
| 590 |
|
| 591 |
return req;
|
| 592 |
} |
| 593 |
|
| 594 |
uint8_t *scsi_req_get_buf(SCSIRequest *req) |
| 595 |
{
|
| 596 |
return req->ops->get_buf(req);
|
| 597 |
} |
| 598 |
|
| 599 |
static void scsi_clear_unit_attention(SCSIRequest *req) |
| 600 |
{
|
| 601 |
SCSISense *ua; |
| 602 |
if (req->dev->unit_attention.key != UNIT_ATTENTION &&
|
| 603 |
req->bus->unit_attention.key != UNIT_ATTENTION) {
|
| 604 |
return;
|
| 605 |
} |
| 606 |
|
| 607 |
/*
|
| 608 |
* If an INQUIRY command enters the enabled command state,
|
| 609 |
* the device server shall [not] clear any unit attention condition;
|
| 610 |
* See also MMC-6, paragraphs 6.5 and 6.6.2.
|
| 611 |
*/
|
| 612 |
if (req->cmd.buf[0] == INQUIRY || |
| 613 |
req->cmd.buf[0] == GET_CONFIGURATION ||
|
| 614 |
req->cmd.buf[0] == GET_EVENT_STATUS_NOTIFICATION) {
|
| 615 |
return;
|
| 616 |
} |
| 617 |
|
| 618 |
if (req->dev->unit_attention.key == UNIT_ATTENTION) {
|
| 619 |
ua = &req->dev->unit_attention; |
| 620 |
} else {
|
| 621 |
ua = &req->bus->unit_attention; |
| 622 |
} |
| 623 |
|
| 624 |
/*
|
| 625 |
* If a REPORT LUNS command enters the enabled command state, [...]
|
| 626 |
* the device server shall clear any pending unit attention condition
|
| 627 |
* with an additional sense code of REPORTED LUNS DATA HAS CHANGED.
|
| 628 |
*/
|
| 629 |
if (req->cmd.buf[0] == REPORT_LUNS && |
| 630 |
!(ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc && |
| 631 |
ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq)) {
|
| 632 |
return;
|
| 633 |
} |
| 634 |
|
| 635 |
*ua = SENSE_CODE(NO_SENSE); |
| 636 |
} |
| 637 |
|
| 638 |
int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len) |
| 639 |
{
|
| 640 |
int ret;
|
| 641 |
|
| 642 |
assert(len >= 14);
|
| 643 |
if (!req->sense_len) {
|
| 644 |
return 0; |
| 645 |
} |
| 646 |
|
| 647 |
ret = scsi_build_sense(req->sense, req->sense_len, buf, len, true);
|
| 648 |
|
| 649 |
/*
|
| 650 |
* FIXME: clearing unit attention conditions upon autosense should be done
|
| 651 |
* only if the UA_INTLCK_CTRL field in the Control mode page is set to 00b
|
| 652 |
* (SAM-5, 5.14).
|
| 653 |
*
|
| 654 |
* We assume UA_INTLCK_CTRL to be 00b for HBAs that support autosense, and
|
| 655 |
* 10b for HBAs that do not support it (do not call scsi_req_get_sense).
|
| 656 |
* Here we handle unit attention clearing for UA_INTLCK_CTRL == 00b.
|
| 657 |
*/
|
| 658 |
if (req->dev->sense_is_ua) {
|
| 659 |
scsi_device_unit_attention_reported(req->dev); |
| 660 |
req->dev->sense_len = 0;
|
| 661 |
req->dev->sense_is_ua = false;
|
| 662 |
} |
| 663 |
return ret;
|
| 664 |
} |
| 665 |
|
| 666 |
int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed) |
| 667 |
{
|
| 668 |
return scsi_build_sense(dev->sense, dev->sense_len, buf, len, fixed);
|
| 669 |
} |
| 670 |
|
| 671 |
void scsi_req_build_sense(SCSIRequest *req, SCSISense sense)
|
| 672 |
{
|
| 673 |
trace_scsi_req_build_sense(req->dev->id, req->lun, req->tag, |
| 674 |
sense.key, sense.asc, sense.ascq); |
| 675 |
memset(req->sense, 0, 18); |
| 676 |
req->sense[0] = 0x70; |
| 677 |
req->sense[2] = sense.key;
|
| 678 |
req->sense[7] = 10; |
| 679 |
req->sense[12] = sense.asc;
|
| 680 |
req->sense[13] = sense.ascq;
|
| 681 |
req->sense_len = 18;
|
| 682 |
} |
| 683 |
|
| 684 |
static void scsi_req_enqueue_internal(SCSIRequest *req) |
| 685 |
{
|
| 686 |
assert(!req->enqueued); |
| 687 |
scsi_req_ref(req); |
| 688 |
if (req->bus->info->get_sg_list) {
|
| 689 |
req->sg = req->bus->info->get_sg_list(req); |
| 690 |
} else {
|
| 691 |
req->sg = NULL;
|
| 692 |
} |
| 693 |
req->enqueued = true;
|
| 694 |
QTAILQ_INSERT_TAIL(&req->dev->requests, req, next); |
| 695 |
} |
| 696 |
|
| 697 |
int32_t scsi_req_enqueue(SCSIRequest *req) |
| 698 |
{
|
| 699 |
int32_t rc; |
| 700 |
|
| 701 |
assert(!req->retry); |
| 702 |
scsi_req_enqueue_internal(req); |
| 703 |
scsi_req_ref(req); |
| 704 |
rc = req->ops->send_command(req, req->cmd.buf); |
| 705 |
scsi_req_unref(req); |
| 706 |
return rc;
|
| 707 |
} |
| 708 |
|
| 709 |
static void scsi_req_dequeue(SCSIRequest *req) |
| 710 |
{
|
| 711 |
trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag); |
| 712 |
req->retry = false;
|
| 713 |
if (req->enqueued) {
|
| 714 |
QTAILQ_REMOVE(&req->dev->requests, req, next); |
| 715 |
req->enqueued = false;
|
| 716 |
scsi_req_unref(req); |
| 717 |
} |
| 718 |
} |
| 719 |
|
| 720 |
static int scsi_get_performance_length(int num_desc, int type, int data_type) |
| 721 |
{
|
| 722 |
/* MMC-6, paragraph 6.7. */
|
| 723 |
switch (type) {
|
| 724 |
case 0: |
| 725 |
if ((data_type & 3) == 0) { |
| 726 |
/* Each descriptor is as in Table 295 - Nominal performance. */
|
| 727 |
return 16 * num_desc + 8; |
| 728 |
} else {
|
| 729 |
/* Each descriptor is as in Table 296 - Exceptions. */
|
| 730 |
return 6 * num_desc + 8; |
| 731 |
} |
| 732 |
case 1: |
| 733 |
case 4: |
| 734 |
case 5: |
| 735 |
return 8 * num_desc + 8; |
| 736 |
case 2: |
| 737 |
return 2048 * num_desc + 8; |
| 738 |
case 3: |
| 739 |
return 16 * num_desc + 8; |
| 740 |
default:
|
| 741 |
return 8; |
| 742 |
} |
| 743 |
} |
| 744 |
|
| 745 |
static int ata_passthrough_xfer_unit(SCSIDevice *dev, uint8_t *buf) |
| 746 |
{
|
| 747 |
int byte_block = (buf[2] >> 2) & 0x1; |
| 748 |
int type = (buf[2] >> 4) & 0x1; |
| 749 |
int xfer_unit;
|
| 750 |
|
| 751 |
if (byte_block) {
|
| 752 |
if (type) {
|
| 753 |
xfer_unit = dev->blocksize; |
| 754 |
} else {
|
| 755 |
xfer_unit = 512;
|
| 756 |
} |
| 757 |
} else {
|
| 758 |
xfer_unit = 1;
|
| 759 |
} |
| 760 |
|
| 761 |
return xfer_unit;
|
| 762 |
} |
| 763 |
|
| 764 |
static int ata_passthrough_12_xfer_size(SCSIDevice *dev, uint8_t *buf) |
| 765 |
{
|
| 766 |
int length = buf[2] & 0x3; |
| 767 |
int xfer;
|
| 768 |
int unit = ata_passthrough_xfer_unit(dev, buf);
|
| 769 |
|
| 770 |
switch (length) {
|
| 771 |
case 0: |
| 772 |
case 3: /* USB-specific. */ |
| 773 |
default:
|
| 774 |
xfer = 0;
|
| 775 |
break;
|
| 776 |
case 1: |
| 777 |
xfer = buf[3];
|
| 778 |
break;
|
| 779 |
case 2: |
| 780 |
xfer = buf[4];
|
| 781 |
break;
|
| 782 |
} |
| 783 |
|
| 784 |
return xfer * unit;
|
| 785 |
} |
| 786 |
|
| 787 |
static int ata_passthrough_16_xfer_size(SCSIDevice *dev, uint8_t *buf) |
| 788 |
{
|
| 789 |
int extend = buf[1] & 0x1; |
| 790 |
int length = buf[2] & 0x3; |
| 791 |
int xfer;
|
| 792 |
int unit = ata_passthrough_xfer_unit(dev, buf);
|
| 793 |
|
| 794 |
switch (length) {
|
| 795 |
case 0: |
| 796 |
case 3: /* USB-specific. */ |
| 797 |
default:
|
| 798 |
xfer = 0;
|
| 799 |
break;
|
| 800 |
case 1: |
| 801 |
xfer = buf[4];
|
| 802 |
xfer |= (extend ? buf[3] << 8 : 0); |
| 803 |
break;
|
| 804 |
case 2: |
| 805 |
xfer = buf[6];
|
| 806 |
xfer |= (extend ? buf[5] << 8 : 0); |
| 807 |
break;
|
| 808 |
} |
| 809 |
|
| 810 |
return xfer * unit;
|
| 811 |
} |
| 812 |
|
| 813 |
uint32_t scsi_data_cdb_length(uint8_t *buf) |
| 814 |
{
|
| 815 |
if ((buf[0] >> 5) == 0 && buf[4] == 0) { |
| 816 |
return 256; |
| 817 |
} else {
|
| 818 |
return scsi_cdb_length(buf);
|
| 819 |
} |
| 820 |
} |
| 821 |
|
| 822 |
uint32_t scsi_cdb_length(uint8_t *buf) |
| 823 |
{
|
| 824 |
switch (buf[0] >> 5) { |
| 825 |
case 0: |
| 826 |
return buf[4]; |
| 827 |
break;
|
| 828 |
case 1: |
| 829 |
case 2: |
| 830 |
return lduw_be_p(&buf[7]); |
| 831 |
break;
|
| 832 |
case 4: |
| 833 |
return ldl_be_p(&buf[10]) & 0xffffffffULL; |
| 834 |
break;
|
| 835 |
case 5: |
| 836 |
return ldl_be_p(&buf[6]) & 0xffffffffULL; |
| 837 |
break;
|
| 838 |
default:
|
| 839 |
return -1; |
| 840 |
} |
| 841 |
} |
| 842 |
|
| 843 |
static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) |
| 844 |
{
|
| 845 |
cmd->xfer = scsi_cdb_length(buf); |
| 846 |
switch (buf[0]) { |
| 847 |
case TEST_UNIT_READY:
|
| 848 |
case REWIND:
|
| 849 |
case START_STOP:
|
| 850 |
case SET_CAPACITY:
|
| 851 |
case WRITE_FILEMARKS:
|
| 852 |
case WRITE_FILEMARKS_16:
|
| 853 |
case SPACE:
|
| 854 |
case RESERVE:
|
| 855 |
case RELEASE:
|
| 856 |
case ERASE:
|
| 857 |
case ALLOW_MEDIUM_REMOVAL:
|
| 858 |
case VERIFY_10:
|
| 859 |
case SEEK_10:
|
| 860 |
case SYNCHRONIZE_CACHE:
|
| 861 |
case SYNCHRONIZE_CACHE_16:
|
| 862 |
case LOCATE_16:
|
| 863 |
case LOCK_UNLOCK_CACHE:
|
| 864 |
case SET_CD_SPEED:
|
| 865 |
case SET_LIMITS:
|
| 866 |
case WRITE_LONG_10:
|
| 867 |
case UPDATE_BLOCK:
|
| 868 |
case RESERVE_TRACK:
|
| 869 |
case SET_READ_AHEAD:
|
| 870 |
case PRE_FETCH:
|
| 871 |
case PRE_FETCH_16:
|
| 872 |
case ALLOW_OVERWRITE:
|
| 873 |
cmd->xfer = 0;
|
| 874 |
break;
|
| 875 |
case MODE_SENSE:
|
| 876 |
break;
|
| 877 |
case WRITE_SAME_10:
|
| 878 |
case WRITE_SAME_16:
|
| 879 |
cmd->xfer = dev->blocksize; |
| 880 |
break;
|
| 881 |
case READ_CAPACITY_10:
|
| 882 |
cmd->xfer = 8;
|
| 883 |
break;
|
| 884 |
case READ_BLOCK_LIMITS:
|
| 885 |
cmd->xfer = 6;
|
| 886 |
break;
|
| 887 |
case SEND_VOLUME_TAG:
|
| 888 |
/* GPCMD_SET_STREAMING from multimedia commands. */
|
| 889 |
if (dev->type == TYPE_ROM) {
|
| 890 |
cmd->xfer = buf[10] | (buf[9] << 8); |
| 891 |
} else {
|
| 892 |
cmd->xfer = buf[9] | (buf[8] << 8); |
| 893 |
} |
| 894 |
break;
|
| 895 |
case WRITE_6:
|
| 896 |
/* length 0 means 256 blocks */
|
| 897 |
if (cmd->xfer == 0) { |
| 898 |
cmd->xfer = 256;
|
| 899 |
} |
| 900 |
case WRITE_10:
|
| 901 |
case WRITE_VERIFY_10:
|
| 902 |
case WRITE_12:
|
| 903 |
case WRITE_VERIFY_12:
|
| 904 |
case WRITE_16:
|
| 905 |
case WRITE_VERIFY_16:
|
| 906 |
cmd->xfer *= dev->blocksize; |
| 907 |
break;
|
| 908 |
case READ_6:
|
| 909 |
case READ_REVERSE:
|
| 910 |
/* length 0 means 256 blocks */
|
| 911 |
if (cmd->xfer == 0) { |
| 912 |
cmd->xfer = 256;
|
| 913 |
} |
| 914 |
case READ_10:
|
| 915 |
case RECOVER_BUFFERED_DATA:
|
| 916 |
case READ_12:
|
| 917 |
case READ_16:
|
| 918 |
cmd->xfer *= dev->blocksize; |
| 919 |
break;
|
| 920 |
case FORMAT_UNIT:
|
| 921 |
/* MMC mandates the parameter list to be 12-bytes long. Parameters
|
| 922 |
* for block devices are restricted to the header right now. */
|
| 923 |
if (dev->type == TYPE_ROM && (buf[1] & 16)) { |
| 924 |
cmd->xfer = 12;
|
| 925 |
} else {
|
| 926 |
cmd->xfer = (buf[1] & 16) == 0 ? 0 : (buf[1] & 32 ? 8 : 4); |
| 927 |
} |
| 928 |
break;
|
| 929 |
case INQUIRY:
|
| 930 |
case RECEIVE_DIAGNOSTIC:
|
| 931 |
case SEND_DIAGNOSTIC:
|
| 932 |
cmd->xfer = buf[4] | (buf[3] << 8); |
| 933 |
break;
|
| 934 |
case READ_CD:
|
| 935 |
case READ_BUFFER:
|
| 936 |
case WRITE_BUFFER:
|
| 937 |
case SEND_CUE_SHEET:
|
| 938 |
cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16); |
| 939 |
break;
|
| 940 |
case PERSISTENT_RESERVE_OUT:
|
| 941 |
cmd->xfer = ldl_be_p(&buf[5]) & 0xffffffffULL; |
| 942 |
break;
|
| 943 |
case ERASE_12:
|
| 944 |
if (dev->type == TYPE_ROM) {
|
| 945 |
/* MMC command GET PERFORMANCE. */
|
| 946 |
cmd->xfer = scsi_get_performance_length(buf[9] | (buf[8] << 8), |
| 947 |
buf[10], buf[1] & 0x1f); |
| 948 |
} |
| 949 |
break;
|
| 950 |
case MECHANISM_STATUS:
|
| 951 |
case READ_DVD_STRUCTURE:
|
| 952 |
case SEND_DVD_STRUCTURE:
|
| 953 |
case MAINTENANCE_OUT:
|
| 954 |
case MAINTENANCE_IN:
|
| 955 |
if (dev->type == TYPE_ROM) {
|
| 956 |
/* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */
|
| 957 |
cmd->xfer = buf[9] | (buf[8] << 8); |
| 958 |
} |
| 959 |
break;
|
| 960 |
case ATA_PASSTHROUGH_12:
|
| 961 |
if (dev->type == TYPE_ROM) {
|
| 962 |
/* BLANK command of MMC */
|
| 963 |
cmd->xfer = 0;
|
| 964 |
} else {
|
| 965 |
cmd->xfer = ata_passthrough_12_xfer_size(dev, buf); |
| 966 |
} |
| 967 |
break;
|
| 968 |
case ATA_PASSTHROUGH_16:
|
| 969 |
cmd->xfer = ata_passthrough_16_xfer_size(dev, buf); |
| 970 |
break;
|
| 971 |
} |
| 972 |
return 0; |
| 973 |
} |
| 974 |
|
| 975 |
static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) |
| 976 |
{
|
| 977 |
switch (buf[0]) { |
| 978 |
/* stream commands */
|
| 979 |
case ERASE_12:
|
| 980 |
case ERASE_16:
|
| 981 |
cmd->xfer = 0;
|
| 982 |
break;
|
| 983 |
case READ_6:
|
| 984 |
case READ_REVERSE:
|
| 985 |
case RECOVER_BUFFERED_DATA:
|
| 986 |
case WRITE_6:
|
| 987 |
cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16); |
| 988 |
if (buf[1] & 0x01) { /* fixed */ |
| 989 |
cmd->xfer *= dev->blocksize; |
| 990 |
} |
| 991 |
break;
|
| 992 |
case READ_16:
|
| 993 |
case READ_REVERSE_16:
|
| 994 |
case VERIFY_16:
|
| 995 |
case WRITE_16:
|
| 996 |
cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16); |
| 997 |
if (buf[1] & 0x01) { /* fixed */ |
| 998 |
cmd->xfer *= dev->blocksize; |
| 999 |
} |
| 1000 |
break;
|
| 1001 |
case REWIND:
|
| 1002 |
case LOAD_UNLOAD:
|
| 1003 |
cmd->xfer = 0;
|
| 1004 |
break;
|
| 1005 |
case SPACE_16:
|
| 1006 |
cmd->xfer = buf[13] | (buf[12] << 8); |
| 1007 |
break;
|
| 1008 |
case READ_POSITION:
|
| 1009 |
switch (buf[1] & 0x1f) /* operation code */ { |
| 1010 |
case SHORT_FORM_BLOCK_ID:
|
| 1011 |
case SHORT_FORM_VENDOR_SPECIFIC:
|
| 1012 |
cmd->xfer = 20;
|
| 1013 |
break;
|
| 1014 |
case LONG_FORM:
|
| 1015 |
cmd->xfer = 32;
|
| 1016 |
break;
|
| 1017 |
case EXTENDED_FORM:
|
| 1018 |
cmd->xfer = buf[8] | (buf[7] << 8); |
| 1019 |
break;
|
| 1020 |
default:
|
| 1021 |
return -1; |
| 1022 |
} |
| 1023 |
|
| 1024 |
break;
|
| 1025 |
case FORMAT_UNIT:
|
| 1026 |
cmd->xfer = buf[4] | (buf[3] << 8); |
| 1027 |
break;
|
| 1028 |
/* generic commands */
|
| 1029 |
default:
|
| 1030 |
return scsi_req_length(cmd, dev, buf);
|
| 1031 |
} |
| 1032 |
return 0; |
| 1033 |
} |
| 1034 |
|
| 1035 |
static int scsi_req_medium_changer_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf) |
| 1036 |
{
|
| 1037 |
switch (buf[0]) { |
| 1038 |
/* medium changer commands */
|
| 1039 |
case EXCHANGE_MEDIUM:
|
| 1040 |
case INITIALIZE_ELEMENT_STATUS:
|
| 1041 |
case INITIALIZE_ELEMENT_STATUS_WITH_RANGE:
|
| 1042 |
case MOVE_MEDIUM:
|
| 1043 |
case POSITION_TO_ELEMENT:
|
| 1044 |
cmd->xfer = 0;
|
| 1045 |
break;
|
| 1046 |
case READ_ELEMENT_STATUS:
|
| 1047 |
cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16); |
| 1048 |
break;
|
| 1049 |
|
| 1050 |
/* generic commands */
|
| 1051 |
default:
|
| 1052 |
return scsi_req_length(cmd, dev, buf);
|
| 1053 |
} |
| 1054 |
return 0; |
| 1055 |
} |
| 1056 |
|
| 1057 |
|
| 1058 |
static void scsi_cmd_xfer_mode(SCSICommand *cmd) |
| 1059 |
{
|
| 1060 |
if (!cmd->xfer) {
|
| 1061 |
cmd->mode = SCSI_XFER_NONE; |
| 1062 |
return;
|
| 1063 |
} |
| 1064 |
switch (cmd->buf[0]) { |
| 1065 |
case WRITE_6:
|
| 1066 |
case WRITE_10:
|
| 1067 |
case WRITE_VERIFY_10:
|
| 1068 |
case WRITE_12:
|
| 1069 |
case WRITE_VERIFY_12:
|
| 1070 |
case WRITE_16:
|
| 1071 |
case WRITE_VERIFY_16:
|
| 1072 |
case COPY:
|
| 1073 |
case COPY_VERIFY:
|
| 1074 |
case COMPARE:
|
| 1075 |
case CHANGE_DEFINITION:
|
| 1076 |
case LOG_SELECT:
|
| 1077 |
case MODE_SELECT:
|
| 1078 |
case MODE_SELECT_10:
|
| 1079 |
case SEND_DIAGNOSTIC:
|
| 1080 |
case WRITE_BUFFER:
|
| 1081 |
case FORMAT_UNIT:
|
| 1082 |
case REASSIGN_BLOCKS:
|
| 1083 |
case SEARCH_EQUAL:
|
| 1084 |
case SEARCH_HIGH:
|
| 1085 |
case SEARCH_LOW:
|
| 1086 |
case UPDATE_BLOCK:
|
| 1087 |
case WRITE_LONG_10:
|
| 1088 |
case WRITE_SAME_10:
|
| 1089 |
case WRITE_SAME_16:
|
| 1090 |
case UNMAP:
|
| 1091 |
case SEARCH_HIGH_12:
|
| 1092 |
case SEARCH_EQUAL_12:
|
| 1093 |
case SEARCH_LOW_12:
|
| 1094 |
case MEDIUM_SCAN:
|
| 1095 |
case SEND_VOLUME_TAG:
|
| 1096 |
case SEND_CUE_SHEET:
|
| 1097 |
case SEND_DVD_STRUCTURE:
|
| 1098 |
case PERSISTENT_RESERVE_OUT:
|
| 1099 |
case MAINTENANCE_OUT:
|
| 1100 |
cmd->mode = SCSI_XFER_TO_DEV; |
| 1101 |
break;
|
| 1102 |
case ATA_PASSTHROUGH_12:
|
| 1103 |
case ATA_PASSTHROUGH_16:
|
| 1104 |
/* T_DIR */
|
| 1105 |
cmd->mode = (cmd->buf[2] & 0x8) ? |
| 1106 |
SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV; |
| 1107 |
break;
|
| 1108 |
default:
|
| 1109 |
cmd->mode = SCSI_XFER_FROM_DEV; |
| 1110 |
break;
|
| 1111 |
} |
| 1112 |
} |
| 1113 |
|
| 1114 |
static uint64_t scsi_cmd_lba(SCSICommand *cmd)
|
| 1115 |
{
|
| 1116 |
uint8_t *buf = cmd->buf; |
| 1117 |
uint64_t lba; |
| 1118 |
|
| 1119 |
switch (buf[0] >> 5) { |
| 1120 |
case 0: |
| 1121 |
lba = ldl_be_p(&buf[0]) & 0x1fffff; |
| 1122 |
break;
|
| 1123 |
case 1: |
| 1124 |
case 2: |
| 1125 |
case 5: |
| 1126 |
lba = ldl_be_p(&buf[2]) & 0xffffffffULL; |
| 1127 |
break;
|
| 1128 |
case 4: |
| 1129 |
lba = ldq_be_p(&buf[2]);
|
| 1130 |
break;
|
| 1131 |
default:
|
| 1132 |
lba = -1;
|
| 1133 |
|
| 1134 |
} |
| 1135 |
return lba;
|
| 1136 |
} |
| 1137 |
|
| 1138 |
int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
|
| 1139 |
{
|
| 1140 |
int rc;
|
| 1141 |
|
| 1142 |
switch (buf[0] >> 5) { |
| 1143 |
case 0: |
| 1144 |
cmd->len = 6;
|
| 1145 |
break;
|
| 1146 |
case 1: |
| 1147 |
case 2: |
| 1148 |
cmd->len = 10;
|
| 1149 |
break;
|
| 1150 |
case 4: |
| 1151 |
cmd->len = 16;
|
| 1152 |
break;
|
| 1153 |
case 5: |
| 1154 |
cmd->len = 12;
|
| 1155 |
break;
|
| 1156 |
default:
|
| 1157 |
return -1; |
| 1158 |
} |
| 1159 |
|
| 1160 |
switch (dev->type) {
|
| 1161 |
case TYPE_TAPE:
|
| 1162 |
rc = scsi_req_stream_length(cmd, dev, buf); |
| 1163 |
break;
|
| 1164 |
case TYPE_MEDIUM_CHANGER:
|
| 1165 |
rc = scsi_req_medium_changer_length(cmd, dev, buf); |
| 1166 |
break;
|
| 1167 |
default:
|
| 1168 |
rc = scsi_req_length(cmd, dev, buf); |
| 1169 |
break;
|
| 1170 |
} |
| 1171 |
|
| 1172 |
if (rc != 0) |
| 1173 |
return rc;
|
| 1174 |
|
| 1175 |
memcpy(cmd->buf, buf, cmd->len); |
| 1176 |
scsi_cmd_xfer_mode(cmd); |
| 1177 |
cmd->lba = scsi_cmd_lba(cmd); |
| 1178 |
return 0; |
| 1179 |
} |
| 1180 |
|
| 1181 |
void scsi_device_report_change(SCSIDevice *dev, SCSISense sense)
|
| 1182 |
{
|
| 1183 |
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); |
| 1184 |
|
| 1185 |
scsi_device_set_ua(dev, sense); |
| 1186 |
if (bus->info->change) {
|
| 1187 |
bus->info->change(bus, dev, sense); |
| 1188 |
} |
| 1189 |
} |
| 1190 |
|
| 1191 |
/*
|
| 1192 |
* Predefined sense codes
|
| 1193 |
*/
|
| 1194 |
|
| 1195 |
/* No sense data available */
|
| 1196 |
const struct SCSISense sense_code_NO_SENSE = { |
| 1197 |
.key = NO_SENSE , .asc = 0x00 , .ascq = 0x00 |
| 1198 |
}; |
| 1199 |
|
| 1200 |
/* LUN not ready, Manual intervention required */
|
| 1201 |
const struct SCSISense sense_code_LUN_NOT_READY = { |
| 1202 |
.key = NOT_READY, .asc = 0x04, .ascq = 0x03 |
| 1203 |
}; |
| 1204 |
|
| 1205 |
/* LUN not ready, Medium not present */
|
| 1206 |
const struct SCSISense sense_code_NO_MEDIUM = { |
| 1207 |
.key = NOT_READY, .asc = 0x3a, .ascq = 0x00 |
| 1208 |
}; |
| 1209 |
|
| 1210 |
/* LUN not ready, medium removal prevented */
|
| 1211 |
const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = { |
| 1212 |
.key = NOT_READY, .asc = 0x53, .ascq = 0x02 |
| 1213 |
}; |
| 1214 |
|
| 1215 |
/* Hardware error, internal target failure */
|
| 1216 |
const struct SCSISense sense_code_TARGET_FAILURE = { |
| 1217 |
.key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00 |
| 1218 |
}; |
| 1219 |
|
| 1220 |
/* Illegal request, invalid command operation code */
|
| 1221 |
const struct SCSISense sense_code_INVALID_OPCODE = { |
| 1222 |
.key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00 |
| 1223 |
}; |
| 1224 |
|
| 1225 |
/* Illegal request, LBA out of range */
|
| 1226 |
const struct SCSISense sense_code_LBA_OUT_OF_RANGE = { |
| 1227 |
.key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00 |
| 1228 |
}; |
| 1229 |
|
| 1230 |
/* Illegal request, Invalid field in CDB */
|
| 1231 |
const struct SCSISense sense_code_INVALID_FIELD = { |
| 1232 |
.key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00 |
| 1233 |
}; |
| 1234 |
|
| 1235 |
/* Illegal request, Invalid field in parameter list */
|
| 1236 |
const struct SCSISense sense_code_INVALID_PARAM = { |
| 1237 |
.key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00 |
| 1238 |
}; |
| 1239 |
|
| 1240 |
/* Illegal request, Parameter list length error */
|
| 1241 |
const struct SCSISense sense_code_INVALID_PARAM_LEN = { |
| 1242 |
.key = ILLEGAL_REQUEST, .asc = 0x1a, .ascq = 0x00 |
| 1243 |
}; |
| 1244 |
|
| 1245 |
/* Illegal request, LUN not supported */
|
| 1246 |
const struct SCSISense sense_code_LUN_NOT_SUPPORTED = { |
| 1247 |
.key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00 |
| 1248 |
}; |
| 1249 |
|
| 1250 |
/* Illegal request, Saving parameters not supported */
|
| 1251 |
const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = { |
| 1252 |
.key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00 |
| 1253 |
}; |
| 1254 |
|
| 1255 |
/* Illegal request, Incompatible medium installed */
|
| 1256 |
const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = { |
| 1257 |
.key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00 |
| 1258 |
}; |
| 1259 |
|
| 1260 |
/* Illegal request, medium removal prevented */
|
| 1261 |
const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = { |
| 1262 |
.key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x02 |
| 1263 |
}; |
| 1264 |
|
| 1265 |
/* Command aborted, I/O process terminated */
|
| 1266 |
const struct SCSISense sense_code_IO_ERROR = { |
| 1267 |
.key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06 |
| 1268 |
}; |
| 1269 |
|
| 1270 |
/* Command aborted, I_T Nexus loss occurred */
|
| 1271 |
const struct SCSISense sense_code_I_T_NEXUS_LOSS = { |
| 1272 |
.key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07 |
| 1273 |
}; |
| 1274 |
|
| 1275 |
/* Command aborted, Logical Unit failure */
|
| 1276 |
const struct SCSISense sense_code_LUN_FAILURE = { |
| 1277 |
.key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01 |
| 1278 |
}; |
| 1279 |
|
| 1280 |
/* Unit attention, Capacity data has changed */
|
| 1281 |
const struct SCSISense sense_code_CAPACITY_CHANGED = { |
| 1282 |
.key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09 |
| 1283 |
}; |
| 1284 |
|
| 1285 |
/* Unit attention, Power on, reset or bus device reset occurred */
|
| 1286 |
const struct SCSISense sense_code_RESET = { |
| 1287 |
.key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00 |
| 1288 |
}; |
| 1289 |
|
| 1290 |
/* Unit attention, No medium */
|
| 1291 |
const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = { |
| 1292 |
.key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00 |
| 1293 |
}; |
| 1294 |
|
| 1295 |
/* Unit attention, Medium may have changed */
|
| 1296 |
const struct SCSISense sense_code_MEDIUM_CHANGED = { |
| 1297 |
.key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00 |
| 1298 |
}; |
| 1299 |
|
| 1300 |
/* Unit attention, Reported LUNs data has changed */
|
| 1301 |
const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = { |
| 1302 |
.key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e |
| 1303 |
}; |
| 1304 |
|
| 1305 |
/* Unit attention, Device internal reset */
|
| 1306 |
const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = { |
| 1307 |
.key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04 |
| 1308 |
}; |
| 1309 |
|
| 1310 |
/* Data Protection, Write Protected */
|
| 1311 |
const struct SCSISense sense_code_WRITE_PROTECTED = { |
| 1312 |
.key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00 |
| 1313 |
}; |
| 1314 |
|
| 1315 |
/*
|
| 1316 |
* scsi_build_sense
|
| 1317 |
*
|
| 1318 |
* Convert between fixed and descriptor sense buffers
|
| 1319 |
*/
|
| 1320 |
int scsi_build_sense(uint8_t *in_buf, int in_len, |
| 1321 |
uint8_t *buf, int len, bool fixed) |
| 1322 |
{
|
| 1323 |
bool fixed_in;
|
| 1324 |
SCSISense sense; |
| 1325 |
if (!fixed && len < 8) { |
| 1326 |
return 0; |
| 1327 |
} |
| 1328 |
|
| 1329 |
if (in_len == 0) { |
| 1330 |
sense.key = NO_SENSE; |
| 1331 |
sense.asc = 0;
|
| 1332 |
sense.ascq = 0;
|
| 1333 |
} else {
|
| 1334 |
fixed_in = (in_buf[0] & 2) == 0; |
| 1335 |
|
| 1336 |
if (fixed == fixed_in) {
|
| 1337 |
memcpy(buf, in_buf, MIN(len, in_len)); |
| 1338 |
return MIN(len, in_len);
|
| 1339 |
} |
| 1340 |
|
| 1341 |
if (fixed_in) {
|
| 1342 |
sense.key = in_buf[2];
|
| 1343 |
sense.asc = in_buf[12];
|
| 1344 |
sense.ascq = in_buf[13];
|
| 1345 |
} else {
|
| 1346 |
sense.key = in_buf[1];
|
| 1347 |
sense.asc = in_buf[2];
|
| 1348 |
sense.ascq = in_buf[3];
|
| 1349 |
} |
| 1350 |
} |
| 1351 |
|
| 1352 |
memset(buf, 0, len);
|
| 1353 |
if (fixed) {
|
| 1354 |
/* Return fixed format sense buffer */
|
| 1355 |
buf[0] = 0x70; |
| 1356 |
buf[2] = sense.key;
|
| 1357 |
buf[7] = 10; |
| 1358 |
buf[12] = sense.asc;
|
| 1359 |
buf[13] = sense.ascq;
|
| 1360 |
return MIN(len, 18); |
| 1361 |
} else {
|
| 1362 |
/* Return descriptor format sense buffer */
|
| 1363 |
buf[0] = 0x72; |
| 1364 |
buf[1] = sense.key;
|
| 1365 |
buf[2] = sense.asc;
|
| 1366 |
buf[3] = sense.ascq;
|
| 1367 |
return 8; |
| 1368 |
} |
| 1369 |
} |
| 1370 |
|
| 1371 |
static const char *scsi_command_name(uint8_t cmd) |
| 1372 |
{
|
| 1373 |
static const char *names[] = { |
| 1374 |
[ TEST_UNIT_READY ] = "TEST_UNIT_READY",
|
| 1375 |
[ REWIND ] = "REWIND",
|
| 1376 |
[ REQUEST_SENSE ] = "REQUEST_SENSE",
|
| 1377 |
[ FORMAT_UNIT ] = "FORMAT_UNIT",
|
| 1378 |
[ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS",
|
| 1379 |
[ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS",
|
| 1380 |
/* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */
|
| 1381 |
[ READ_6 ] = "READ_6",
|
| 1382 |
[ WRITE_6 ] = "WRITE_6",
|
| 1383 |
[ SET_CAPACITY ] = "SET_CAPACITY",
|
| 1384 |
[ READ_REVERSE ] = "READ_REVERSE",
|
| 1385 |
[ WRITE_FILEMARKS ] = "WRITE_FILEMARKS",
|
| 1386 |
[ SPACE ] = "SPACE",
|
| 1387 |
[ INQUIRY ] = "INQUIRY",
|
| 1388 |
[ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA",
|
| 1389 |
[ MAINTENANCE_IN ] = "MAINTENANCE_IN",
|
| 1390 |
[ MAINTENANCE_OUT ] = "MAINTENANCE_OUT",
|
| 1391 |
[ MODE_SELECT ] = "MODE_SELECT",
|
| 1392 |
[ RESERVE ] = "RESERVE",
|
| 1393 |
[ RELEASE ] = "RELEASE",
|
| 1394 |
[ COPY ] = "COPY",
|
| 1395 |
[ ERASE ] = "ERASE",
|
| 1396 |
[ MODE_SENSE ] = "MODE_SENSE",
|
| 1397 |
[ START_STOP ] = "START_STOP/LOAD_UNLOAD",
|
| 1398 |
/* LOAD_UNLOAD and START_STOP use the same operation code */
|
| 1399 |
[ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC",
|
| 1400 |
[ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC",
|
| 1401 |
[ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL",
|
| 1402 |
[ READ_CAPACITY_10 ] = "READ_CAPACITY_10",
|
| 1403 |
[ READ_10 ] = "READ_10",
|
| 1404 |
[ WRITE_10 ] = "WRITE_10",
|
| 1405 |
[ SEEK_10 ] = "SEEK_10/POSITION_TO_ELEMENT",
|
| 1406 |
/* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */
|
| 1407 |
[ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10",
|
| 1408 |
[ VERIFY_10 ] = "VERIFY_10",
|
| 1409 |
[ SEARCH_HIGH ] = "SEARCH_HIGH",
|
| 1410 |
[ SEARCH_EQUAL ] = "SEARCH_EQUAL",
|
| 1411 |
[ SEARCH_LOW ] = "SEARCH_LOW",
|
| 1412 |
[ SET_LIMITS ] = "SET_LIMITS",
|
| 1413 |
[ PRE_FETCH ] = "PRE_FETCH/READ_POSITION",
|
| 1414 |
/* READ_POSITION and PRE_FETCH use the same operation code */
|
| 1415 |
[ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE",
|
| 1416 |
[ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE",
|
| 1417 |
[ READ_DEFECT_DATA ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE",
|
| 1418 |
/* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */
|
| 1419 |
[ MEDIUM_SCAN ] = "MEDIUM_SCAN",
|
| 1420 |
[ COMPARE ] = "COMPARE",
|
| 1421 |
[ COPY_VERIFY ] = "COPY_VERIFY",
|
| 1422 |
[ WRITE_BUFFER ] = "WRITE_BUFFER",
|
| 1423 |
[ READ_BUFFER ] = "READ_BUFFER",
|
| 1424 |
[ UPDATE_BLOCK ] = "UPDATE_BLOCK",
|
| 1425 |
[ READ_LONG_10 ] = "READ_LONG_10",
|
| 1426 |
[ WRITE_LONG_10 ] = "WRITE_LONG_10",
|
| 1427 |
[ CHANGE_DEFINITION ] = "CHANGE_DEFINITION",
|
| 1428 |
[ WRITE_SAME_10 ] = "WRITE_SAME_10",
|
| 1429 |
[ UNMAP ] = "UNMAP",
|
| 1430 |
[ READ_TOC ] = "READ_TOC",
|
| 1431 |
[ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT",
|
| 1432 |
[ SANITIZE ] = "SANITIZE",
|
| 1433 |
[ GET_CONFIGURATION ] = "GET_CONFIGURATION",
|
| 1434 |
[ LOG_SELECT ] = "LOG_SELECT",
|
| 1435 |
[ LOG_SENSE ] = "LOG_SENSE",
|
| 1436 |
[ MODE_SELECT_10 ] = "MODE_SELECT_10",
|
| 1437 |
[ RESERVE_10 ] = "RESERVE_10",
|
| 1438 |
[ RELEASE_10 ] = "RELEASE_10",
|
| 1439 |
[ MODE_SENSE_10 ] = "MODE_SENSE_10",
|
| 1440 |
[ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN",
|
| 1441 |
[ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT",
|
| 1442 |
[ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16",
|
| 1443 |
[ EXTENDED_COPY ] = "EXTENDED_COPY",
|
| 1444 |
[ ATA_PASSTHROUGH_16 ] = "ATA_PASSTHROUGH_16",
|
| 1445 |
[ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN",
|
| 1446 |
[ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT",
|
| 1447 |
[ READ_16 ] = "READ_16",
|
| 1448 |
[ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE",
|
| 1449 |
[ WRITE_16 ] = "WRITE_16",
|
| 1450 |
[ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16",
|
| 1451 |
[ VERIFY_16 ] = "VERIFY_16",
|
| 1452 |
[ PRE_FETCH_16 ] = "PRE_FETCH_16",
|
| 1453 |
[ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16",
|
| 1454 |
/* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */
|
| 1455 |
[ LOCATE_16 ] = "LOCATE_16",
|
| 1456 |
[ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16",
|
| 1457 |
/* ERASE_16 and WRITE_SAME_16 use the same operation code */
|
| 1458 |
[ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16",
|
| 1459 |
[ WRITE_LONG_16 ] = "WRITE_LONG_16",
|
| 1460 |
[ REPORT_LUNS ] = "REPORT_LUNS",
|
| 1461 |
[ ATA_PASSTHROUGH_12 ] = "BLANK/ATA_PASSTHROUGH_12",
|
| 1462 |
[ MOVE_MEDIUM ] = "MOVE_MEDIUM",
|
| 1463 |
[ EXCHANGE_MEDIUM ] = "EXCHANGE MEDIUM",
|
| 1464 |
[ READ_12 ] = "READ_12",
|
| 1465 |
[ WRITE_12 ] = "WRITE_12",
|
| 1466 |
[ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE",
|
| 1467 |
/* ERASE_12 and GET_PERFORMANCE use the same operation code */
|
| 1468 |
[ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12",
|
| 1469 |
[ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12",
|
| 1470 |
[ VERIFY_12 ] = "VERIFY_12",
|
| 1471 |
[ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12",
|
| 1472 |
[ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12",
|
| 1473 |
[ SEARCH_LOW_12 ] = "SEARCH_LOW_12",
|
| 1474 |
[ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS",
|
| 1475 |
[ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING",
|
| 1476 |
/* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */
|
| 1477 |
[ READ_CD ] = "READ_CD",
|
| 1478 |
[ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12",
|
| 1479 |
[ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE",
|
| 1480 |
[ RESERVE_TRACK ] = "RESERVE_TRACK",
|
| 1481 |
[ SEND_CUE_SHEET ] = "SEND_CUE_SHEET",
|
| 1482 |
[ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE",
|
| 1483 |
[ SET_CD_SPEED ] = "SET_CD_SPEED",
|
| 1484 |
[ SET_READ_AHEAD ] = "SET_READ_AHEAD",
|
| 1485 |
[ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE",
|
| 1486 |
[ MECHANISM_STATUS ] = "MECHANISM_STATUS",
|
| 1487 |
}; |
| 1488 |
|
| 1489 |
if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL) |
| 1490 |
return "*UNKNOWN*"; |
| 1491 |
return names[cmd];
|
| 1492 |
} |
| 1493 |
|
| 1494 |
SCSIRequest *scsi_req_ref(SCSIRequest *req) |
| 1495 |
{
|
| 1496 |
assert(req->refcount > 0);
|
| 1497 |
req->refcount++; |
| 1498 |
return req;
|
| 1499 |
} |
| 1500 |
|
| 1501 |
void scsi_req_unref(SCSIRequest *req)
|
| 1502 |
{
|
| 1503 |
assert(req->refcount > 0);
|
| 1504 |
if (--req->refcount == 0) { |
| 1505 |
BusState *qbus = req->dev->qdev.parent_bus; |
| 1506 |
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, qbus); |
| 1507 |
|
| 1508 |
if (bus->info->free_request && req->hba_private) {
|
| 1509 |
bus->info->free_request(bus, req->hba_private); |
| 1510 |
} |
| 1511 |
if (req->ops->free_req) {
|
| 1512 |
req->ops->free_req(req); |
| 1513 |
} |
| 1514 |
object_unref(OBJECT(req->dev)); |
| 1515 |
object_unref(OBJECT(qbus->parent)); |
| 1516 |
g_free(req); |
| 1517 |
} |
| 1518 |
} |
| 1519 |
|
| 1520 |
/* Tell the device that we finished processing this chunk of I/O. It
|
| 1521 |
will start the next chunk or complete the command. */
|
| 1522 |
void scsi_req_continue(SCSIRequest *req)
|
| 1523 |
{
|
| 1524 |
if (req->io_canceled) {
|
| 1525 |
trace_scsi_req_continue_canceled(req->dev->id, req->lun, req->tag); |
| 1526 |
return;
|
| 1527 |
} |
| 1528 |
trace_scsi_req_continue(req->dev->id, req->lun, req->tag); |
| 1529 |
if (req->cmd.mode == SCSI_XFER_TO_DEV) {
|
| 1530 |
req->ops->write_data(req); |
| 1531 |
} else {
|
| 1532 |
req->ops->read_data(req); |
| 1533 |
} |
| 1534 |
} |
| 1535 |
|
| 1536 |
/* Called by the devices when data is ready for the HBA. The HBA should
|
| 1537 |
start a DMA operation to read or fill the device's data buffer.
|
| 1538 |
Once it completes, calling scsi_req_continue will restart I/O. */
|
| 1539 |
void scsi_req_data(SCSIRequest *req, int len) |
| 1540 |
{
|
| 1541 |
uint8_t *buf; |
| 1542 |
if (req->io_canceled) {
|
| 1543 |
trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len); |
| 1544 |
return;
|
| 1545 |
} |
| 1546 |
trace_scsi_req_data(req->dev->id, req->lun, req->tag, len); |
| 1547 |
assert(req->cmd.mode != SCSI_XFER_NONE); |
| 1548 |
if (!req->sg) {
|
| 1549 |
req->resid -= len; |
| 1550 |
req->bus->info->transfer_data(req, len); |
| 1551 |
return;
|
| 1552 |
} |
| 1553 |
|
| 1554 |
/* If the device calls scsi_req_data and the HBA specified a
|
| 1555 |
* scatter/gather list, the transfer has to happen in a single
|
| 1556 |
* step. */
|
| 1557 |
assert(!req->dma_started); |
| 1558 |
req->dma_started = true;
|
| 1559 |
|
| 1560 |
buf = scsi_req_get_buf(req); |
| 1561 |
if (req->cmd.mode == SCSI_XFER_FROM_DEV) {
|
| 1562 |
req->resid = dma_buf_read(buf, len, req->sg); |
| 1563 |
} else {
|
| 1564 |
req->resid = dma_buf_write(buf, len, req->sg); |
| 1565 |
} |
| 1566 |
scsi_req_continue(req); |
| 1567 |
} |
| 1568 |
|
| 1569 |
void scsi_req_print(SCSIRequest *req)
|
| 1570 |
{
|
| 1571 |
FILE *fp = stderr; |
| 1572 |
int i;
|
| 1573 |
|
| 1574 |
fprintf(fp, "[%s id=%d] %s",
|
| 1575 |
req->dev->qdev.parent_bus->name, |
| 1576 |
req->dev->id, |
| 1577 |
scsi_command_name(req->cmd.buf[0]));
|
| 1578 |
for (i = 1; i < req->cmd.len; i++) { |
| 1579 |
fprintf(fp, " 0x%02x", req->cmd.buf[i]);
|
| 1580 |
} |
| 1581 |
switch (req->cmd.mode) {
|
| 1582 |
case SCSI_XFER_NONE:
|
| 1583 |
fprintf(fp, " - none\n");
|
| 1584 |
break;
|
| 1585 |
case SCSI_XFER_FROM_DEV:
|
| 1586 |
fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer);
|
| 1587 |
break;
|
| 1588 |
case SCSI_XFER_TO_DEV:
|
| 1589 |
fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer);
|
| 1590 |
break;
|
| 1591 |
default:
|
| 1592 |
fprintf(fp, " - Oops\n");
|
| 1593 |
break;
|
| 1594 |
} |
| 1595 |
} |
| 1596 |
|
| 1597 |
void scsi_req_complete(SCSIRequest *req, int status) |
| 1598 |
{
|
| 1599 |
assert(req->status == -1);
|
| 1600 |
req->status = status; |
| 1601 |
|
| 1602 |
assert(req->sense_len <= sizeof(req->sense));
|
| 1603 |
if (status == GOOD) {
|
| 1604 |
req->sense_len = 0;
|
| 1605 |
} |
| 1606 |
|
| 1607 |
if (req->sense_len) {
|
| 1608 |
memcpy(req->dev->sense, req->sense, req->sense_len); |
| 1609 |
req->dev->sense_len = req->sense_len; |
| 1610 |
req->dev->sense_is_ua = (req->ops == &reqops_unit_attention); |
| 1611 |
} else {
|
| 1612 |
req->dev->sense_len = 0;
|
| 1613 |
req->dev->sense_is_ua = false;
|
| 1614 |
} |
| 1615 |
|
| 1616 |
/*
|
| 1617 |
* Unit attention state is now stored in the device's sense buffer
|
| 1618 |
* if the HBA didn't do autosense. Clear the pending unit attention
|
| 1619 |
* flags.
|
| 1620 |
*/
|
| 1621 |
scsi_clear_unit_attention(req); |
| 1622 |
|
| 1623 |
scsi_req_ref(req); |
| 1624 |
scsi_req_dequeue(req); |
| 1625 |
req->bus->info->complete(req, req->status, req->resid); |
| 1626 |
scsi_req_unref(req); |
| 1627 |
} |
| 1628 |
|
| 1629 |
void scsi_req_cancel(SCSIRequest *req)
|
| 1630 |
{
|
| 1631 |
trace_scsi_req_cancel(req->dev->id, req->lun, req->tag); |
| 1632 |
if (!req->enqueued) {
|
| 1633 |
return;
|
| 1634 |
} |
| 1635 |
scsi_req_ref(req); |
| 1636 |
scsi_req_dequeue(req); |
| 1637 |
req->io_canceled = true;
|
| 1638 |
if (req->ops->cancel_io) {
|
| 1639 |
req->ops->cancel_io(req); |
| 1640 |
} |
| 1641 |
if (req->bus->info->cancel) {
|
| 1642 |
req->bus->info->cancel(req); |
| 1643 |
} |
| 1644 |
scsi_req_unref(req); |
| 1645 |
} |
| 1646 |
|
| 1647 |
void scsi_req_abort(SCSIRequest *req, int status) |
| 1648 |
{
|
| 1649 |
if (!req->enqueued) {
|
| 1650 |
return;
|
| 1651 |
} |
| 1652 |
scsi_req_ref(req); |
| 1653 |
scsi_req_dequeue(req); |
| 1654 |
req->io_canceled = true;
|
| 1655 |
if (req->ops->cancel_io) {
|
| 1656 |
req->ops->cancel_io(req); |
| 1657 |
} |
| 1658 |
scsi_req_complete(req, status); |
| 1659 |
scsi_req_unref(req); |
| 1660 |
} |
| 1661 |
|
| 1662 |
static int scsi_ua_precedence(SCSISense sense) |
| 1663 |
{
|
| 1664 |
if (sense.key != UNIT_ATTENTION) {
|
| 1665 |
return INT_MAX;
|
| 1666 |
} |
| 1667 |
if (sense.asc == 0x29 && sense.ascq == 0x04) { |
| 1668 |
/* DEVICE INTERNAL RESET goes with POWER ON OCCURRED */
|
| 1669 |
return 1; |
| 1670 |
} else if (sense.asc == 0x3F && sense.ascq == 0x01) { |
| 1671 |
/* MICROCODE HAS BEEN CHANGED goes with SCSI BUS RESET OCCURRED */
|
| 1672 |
return 2; |
| 1673 |
} else if (sense.asc == 0x29 && (sense.ascq == 0x05 || sense.ascq == 0x06)) { |
| 1674 |
/* These two go with "all others". */
|
| 1675 |
; |
| 1676 |
} else if (sense.asc == 0x29 && sense.ascq <= 0x07) { |
| 1677 |
/* POWER ON, RESET OR BUS DEVICE RESET OCCURRED = 0
|
| 1678 |
* POWER ON OCCURRED = 1
|
| 1679 |
* SCSI BUS RESET OCCURRED = 2
|
| 1680 |
* BUS DEVICE RESET FUNCTION OCCURRED = 3
|
| 1681 |
* I_T NEXUS LOSS OCCURRED = 7
|
| 1682 |
*/
|
| 1683 |
return sense.ascq;
|
| 1684 |
} else if (sense.asc == 0x2F && sense.ascq == 0x01) { |
| 1685 |
/* COMMANDS CLEARED BY POWER LOSS NOTIFICATION */
|
| 1686 |
return 8; |
| 1687 |
} |
| 1688 |
return (sense.asc << 8) | sense.ascq; |
| 1689 |
} |
| 1690 |
|
| 1691 |
void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense)
|
| 1692 |
{
|
| 1693 |
int prec1, prec2;
|
| 1694 |
if (sense.key != UNIT_ATTENTION) {
|
| 1695 |
return;
|
| 1696 |
} |
| 1697 |
trace_scsi_device_set_ua(sdev->id, sdev->lun, sense.key, |
| 1698 |
sense.asc, sense.ascq); |
| 1699 |
|
| 1700 |
/*
|
| 1701 |
* Override a pre-existing unit attention condition, except for a more
|
| 1702 |
* important reset condition.
|
| 1703 |
*/
|
| 1704 |
prec1 = scsi_ua_precedence(sdev->unit_attention); |
| 1705 |
prec2 = scsi_ua_precedence(sense); |
| 1706 |
if (prec2 < prec1) {
|
| 1707 |
sdev->unit_attention = sense; |
| 1708 |
} |
| 1709 |
} |
| 1710 |
|
| 1711 |
void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense)
|
| 1712 |
{
|
| 1713 |
SCSIRequest *req; |
| 1714 |
|
| 1715 |
while (!QTAILQ_EMPTY(&sdev->requests)) {
|
| 1716 |
req = QTAILQ_FIRST(&sdev->requests); |
| 1717 |
scsi_req_cancel(req); |
| 1718 |
} |
| 1719 |
|
| 1720 |
scsi_device_set_ua(sdev, sense); |
| 1721 |
} |
| 1722 |
|
| 1723 |
static char *scsibus_get_dev_path(DeviceState *dev) |
| 1724 |
{
|
| 1725 |
SCSIDevice *d = DO_UPCAST(SCSIDevice, qdev, dev); |
| 1726 |
DeviceState *hba = dev->parent_bus->parent; |
| 1727 |
char *id;
|
| 1728 |
char *path;
|
| 1729 |
|
| 1730 |
id = qdev_get_dev_path(hba); |
| 1731 |
if (id) {
|
| 1732 |
path = g_strdup_printf("%s/%d:%d:%d", id, d->channel, d->id, d->lun);
|
| 1733 |
} else {
|
| 1734 |
path = g_strdup_printf("%d:%d:%d", d->channel, d->id, d->lun);
|
| 1735 |
} |
| 1736 |
g_free(id); |
| 1737 |
return path;
|
| 1738 |
} |
| 1739 |
|
| 1740 |
static char *scsibus_get_fw_dev_path(DeviceState *dev) |
| 1741 |
{
|
| 1742 |
SCSIDevice *d = SCSI_DEVICE(dev); |
| 1743 |
return g_strdup_printf("channel@%x/%s@%x,%x", d->channel, |
| 1744 |
qdev_fw_name(dev), d->id, d->lun); |
| 1745 |
} |
| 1746 |
|
| 1747 |
SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun) |
| 1748 |
{
|
| 1749 |
BusChild *kid; |
| 1750 |
SCSIDevice *target_dev = NULL;
|
| 1751 |
|
| 1752 |
QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children, ChildrenHead, sibling) {
|
| 1753 |
DeviceState *qdev = kid->child; |
| 1754 |
SCSIDevice *dev = SCSI_DEVICE(qdev); |
| 1755 |
|
| 1756 |
if (dev->channel == channel && dev->id == id) {
|
| 1757 |
if (dev->lun == lun) {
|
| 1758 |
return dev;
|
| 1759 |
} |
| 1760 |
target_dev = dev; |
| 1761 |
} |
| 1762 |
} |
| 1763 |
return target_dev;
|
| 1764 |
} |
| 1765 |
|
| 1766 |
/* SCSI request list. For simplicity, pv points to the whole device */
|
| 1767 |
|
| 1768 |
static void put_scsi_requests(QEMUFile *f, void *pv, size_t size) |
| 1769 |
{
|
| 1770 |
SCSIDevice *s = pv; |
| 1771 |
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); |
| 1772 |
SCSIRequest *req; |
| 1773 |
|
| 1774 |
QTAILQ_FOREACH(req, &s->requests, next) {
|
| 1775 |
assert(!req->io_canceled); |
| 1776 |
assert(req->status == -1);
|
| 1777 |
assert(req->enqueued); |
| 1778 |
|
| 1779 |
qemu_put_sbyte(f, req->retry ? 1 : 2); |
| 1780 |
qemu_put_buffer(f, req->cmd.buf, sizeof(req->cmd.buf));
|
| 1781 |
qemu_put_be32s(f, &req->tag); |
| 1782 |
qemu_put_be32s(f, &req->lun); |
| 1783 |
if (bus->info->save_request) {
|
| 1784 |
bus->info->save_request(f, req); |
| 1785 |
} |
| 1786 |
if (req->ops->save_request) {
|
| 1787 |
req->ops->save_request(f, req); |
| 1788 |
} |
| 1789 |
} |
| 1790 |
qemu_put_sbyte(f, 0);
|
| 1791 |
} |
| 1792 |
|
| 1793 |
static int get_scsi_requests(QEMUFile *f, void *pv, size_t size) |
| 1794 |
{
|
| 1795 |
SCSIDevice *s = pv; |
| 1796 |
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus); |
| 1797 |
int8_t sbyte; |
| 1798 |
|
| 1799 |
while ((sbyte = qemu_get_sbyte(f)) > 0) { |
| 1800 |
uint8_t buf[SCSI_CMD_BUF_SIZE]; |
| 1801 |
uint32_t tag; |
| 1802 |
uint32_t lun; |
| 1803 |
SCSIRequest *req; |
| 1804 |
|
| 1805 |
qemu_get_buffer(f, buf, sizeof(buf));
|
| 1806 |
qemu_get_be32s(f, &tag); |
| 1807 |
qemu_get_be32s(f, &lun); |
| 1808 |
req = scsi_req_new(s, tag, lun, buf, NULL);
|
| 1809 |
req->retry = (sbyte == 1);
|
| 1810 |
if (bus->info->load_request) {
|
| 1811 |
req->hba_private = bus->info->load_request(f, req); |
| 1812 |
} |
| 1813 |
if (req->ops->load_request) {
|
| 1814 |
req->ops->load_request(f, req); |
| 1815 |
} |
| 1816 |
|
| 1817 |
/* Just restart it later. */
|
| 1818 |
scsi_req_enqueue_internal(req); |
| 1819 |
|
| 1820 |
/* At this point, the request will be kept alive by the reference
|
| 1821 |
* added by scsi_req_enqueue_internal, so we can release our reference.
|
| 1822 |
* The HBA of course will add its own reference in the load_request
|
| 1823 |
* callback if it needs to hold on the SCSIRequest.
|
| 1824 |
*/
|
| 1825 |
scsi_req_unref(req); |
| 1826 |
} |
| 1827 |
|
| 1828 |
return 0; |
| 1829 |
} |
| 1830 |
|
| 1831 |
static int scsi_qdev_unplug(DeviceState *qdev) |
| 1832 |
{
|
| 1833 |
SCSIDevice *dev = SCSI_DEVICE(qdev); |
| 1834 |
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); |
| 1835 |
|
| 1836 |
if (bus->info->hot_unplug) {
|
| 1837 |
bus->info->hot_unplug(bus, dev); |
| 1838 |
} |
| 1839 |
return qdev_simple_unplug_cb(qdev);
|
| 1840 |
} |
| 1841 |
|
| 1842 |
static const VMStateInfo vmstate_info_scsi_requests = { |
| 1843 |
.name = "scsi-requests",
|
| 1844 |
.get = get_scsi_requests, |
| 1845 |
.put = put_scsi_requests, |
| 1846 |
}; |
| 1847 |
|
| 1848 |
const VMStateDescription vmstate_scsi_device = {
|
| 1849 |
.name = "SCSIDevice",
|
| 1850 |
.version_id = 1,
|
| 1851 |
.minimum_version_id = 1,
|
| 1852 |
.minimum_version_id_old = 1,
|
| 1853 |
.fields = (VMStateField[]) {
|
| 1854 |
VMSTATE_UINT8(unit_attention.key, SCSIDevice), |
| 1855 |
VMSTATE_UINT8(unit_attention.asc, SCSIDevice), |
| 1856 |
VMSTATE_UINT8(unit_attention.ascq, SCSIDevice), |
| 1857 |
VMSTATE_BOOL(sense_is_ua, SCSIDevice), |
| 1858 |
VMSTATE_UINT8_ARRAY(sense, SCSIDevice, SCSI_SENSE_BUF_SIZE), |
| 1859 |
VMSTATE_UINT32(sense_len, SCSIDevice), |
| 1860 |
{
|
| 1861 |
.name = "requests",
|
| 1862 |
.version_id = 0,
|
| 1863 |
.field_exists = NULL,
|
| 1864 |
.size = 0, /* ouch */ |
| 1865 |
.info = &vmstate_info_scsi_requests, |
| 1866 |
.flags = VMS_SINGLE, |
| 1867 |
.offset = 0,
|
| 1868 |
}, |
| 1869 |
VMSTATE_END_OF_LIST() |
| 1870 |
} |
| 1871 |
}; |
| 1872 |
|
| 1873 |
static void scsi_device_class_init(ObjectClass *klass, void *data) |
| 1874 |
{
|
| 1875 |
DeviceClass *k = DEVICE_CLASS(klass); |
| 1876 |
k->bus_type = TYPE_SCSI_BUS; |
| 1877 |
k->init = scsi_qdev_init; |
| 1878 |
k->unplug = scsi_qdev_unplug; |
| 1879 |
k->exit = scsi_qdev_exit; |
| 1880 |
k->props = scsi_props; |
| 1881 |
} |
| 1882 |
|
| 1883 |
static const TypeInfo scsi_device_type_info = { |
| 1884 |
.name = TYPE_SCSI_DEVICE, |
| 1885 |
.parent = TYPE_DEVICE, |
| 1886 |
.instance_size = sizeof(SCSIDevice),
|
| 1887 |
.abstract = true,
|
| 1888 |
.class_size = sizeof(SCSIDeviceClass),
|
| 1889 |
.class_init = scsi_device_class_init, |
| 1890 |
}; |
| 1891 |
|
| 1892 |
static void scsi_register_types(void) |
| 1893 |
{
|
| 1894 |
type_register_static(&scsi_bus_info); |
| 1895 |
type_register_static(&scsi_device_type_info); |
| 1896 |
} |
| 1897 |
|
| 1898 |
type_init(scsi_register_types) |