Revision 6dc06f08 hw/scsi-bus.c
| b/hw/scsi-bus.c | ||
|---|---|---|
| 149 | 149 |
.send_command = scsi_invalid_command |
| 150 | 150 |
}; |
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/* SCSIReqOps implementation for unit attention conditions. */ |
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static int32_t scsi_unit_attention(SCSIRequest *req, uint8_t *buf) |
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{
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if (req->dev && req->dev->unit_attention.key == UNIT_ATTENTION) {
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scsi_req_build_sense(req, req->dev->unit_attention); |
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} else if (req->bus->unit_attention.key == UNIT_ATTENTION) {
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scsi_req_build_sense(req, req->bus->unit_attention); |
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} |
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scsi_req_complete(req, CHECK_CONDITION); |
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return 0; |
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} |
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struct SCSIReqOps reqops_unit_attention = {
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.size = sizeof(SCSIRequest), |
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.send_command = scsi_unit_attention |
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}; |
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/* SCSIReqOps implementation for REPORT LUNS and for commands sent to |
| 153 | 171 |
an invalid LUN. */ |
| 154 | 172 |
|
| ... | ... | |
| 344 | 362 |
SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun, |
| 345 | 363 |
uint8_t *buf, void *hba_private) |
| 346 | 364 |
{
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SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus); |
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SCSIRequest *req; |
| 348 | 367 |
SCSICommand cmd; |
| 349 | 368 |
|
| ... | ... | |
| 358 | 377 |
cmd.lba); |
| 359 | 378 |
} |
| 360 | 379 |
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if (lun != d->lun || |
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if ((d->unit_attention.key == UNIT_ATTENTION || |
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bus->unit_attention.key == UNIT_ATTENTION) && |
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(buf[0] != INQUIRY && |
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buf[0] != REPORT_LUNS && |
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buf[0] != GET_CONFIGURATION && |
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buf[0] != GET_EVENT_STATUS_NOTIFICATION)) {
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req = scsi_req_alloc(&reqops_unit_attention, d, tag, lun, |
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hba_private); |
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} else if (lun != d->lun || |
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| 362 | 389 |
buf[0] == REPORT_LUNS || |
| 363 | 390 |
buf[0] == REQUEST_SENSE) {
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| 364 | 391 |
req = scsi_req_alloc(&reqops_target_command, d, tag, lun, |
| ... | ... | |
| 377 | 404 |
return req->ops->get_buf(req); |
| 378 | 405 |
} |
| 379 | 406 |
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static void scsi_clear_unit_attention(SCSIRequest *req) |
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{
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SCSISense *ua; |
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if (req->dev->unit_attention.key != UNIT_ATTENTION && |
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req->bus->unit_attention.key != UNIT_ATTENTION) {
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return; |
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} |
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/* |
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* If an INQUIRY command enters the enabled command state, |
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* the device server shall [not] clear any unit attention condition; |
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* See also MMC-6, paragraphs 6.5 and 6.6.2. |
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*/ |
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if (req->cmd.buf[0] == INQUIRY || |
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req->cmd.buf[0] == GET_CONFIGURATION || |
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req->cmd.buf[0] == GET_EVENT_STATUS_NOTIFICATION) {
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return; |
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} |
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if (req->dev->unit_attention.key == UNIT_ATTENTION) {
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ua = &req->dev->unit_attention; |
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} else {
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ua = &req->bus->unit_attention; |
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} |
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/* |
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* If a REPORT LUNS command enters the enabled command state, [...] |
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* the device server shall clear any pending unit attention condition |
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* with an additional sense code of REPORTED LUNS DATA HAS CHANGED. |
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*/ |
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if (req->cmd.buf[0] == REPORT_LUNS && |
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!(ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc && |
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ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq)) {
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return; |
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} |
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*ua = SENSE_CODE(NO_SENSE); |
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} |
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int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len) |
| 381 | 447 |
{
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int ret; |
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assert(len >= 14); |
| 383 | 451 |
if (!req->sense_len) {
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return 0; |
| 385 | 453 |
} |
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return scsi_build_sense(req->sense, req->sense_len, buf, len, true); |
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ret = scsi_build_sense(req->sense, req->sense_len, buf, len, true); |
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/* |
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* FIXME: clearing unit attention conditions upon autosense should be done |
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* only if the UA_INTLCK_CTRL field in the Control mode page is set to 00b |
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* (SAM-5, 5.14). |
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* |
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* We assume UA_INTLCK_CTRL to be 00b for HBAs that support autosense, and |
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* 10b for HBAs that do not support it (do not call scsi_req_get_sense). |
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* In the latter case, scsi_req_complete clears unit attention conditions |
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* after moving them to the device's sense buffer. |
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*/ |
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scsi_clear_unit_attention(req); |
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return ret; |
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| 387 | 469 |
} |
| 388 | 470 |
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int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed) |
| ... | ... | |
| 983 | 1065 |
} |
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req->dev->sense_len = req->sense_len; |
| 985 | 1067 |
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/* |
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* Unit attention state is now stored in the device's sense buffer |
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* if the HBA didn't do autosense. Clear the pending unit attention |
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* flags. |
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*/ |
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scsi_clear_unit_attention(req); |
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scsi_req_ref(req); |
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scsi_req_dequeue(req); |
| 988 | 1077 |
req->bus->ops->complete(req, req->status); |
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