/* There are so many devices that report the capacity incorrectly,
* this routine was written to counteract some of the resulting
* problems.
*/
static void last_sector_hacks(struct us_data *us, struct scsi_cmnd *srb)
{
struct gendisk *disk;
struct scsi_disk *sdkp;
u32 sector;
static unsigned char record_not_found[18] = {
[0] = 0x70,
[2] = MEDIUM_ERROR,
[7] = 0x0a,
[12] = 0x14
};
if (!us->use_last_sector_hacks)
return;
if (srb->cmnd[0] != READ_10 && srb->cmnd[0] != WRITE_10)
goto done;
sector = (srb->cmnd[2] << 24) | (srb->cmnd[3] << 16) |
(srb->cmnd[4] << 8) | (srb->cmnd[5]);
disk = srb->request->rq_disk;
if (!disk)
goto done;
sdkp = scsi_disk(disk);
if (!sdkp)
goto done;
if (sector + 1 != sdkp->capacity)
goto done;
if (srb->result == SAM_STAT_GOOD && scsi_get_resid(srb) == 0) {
us->use_last_sector_hacks = 0;
} else {
if (++us->last_sector_retries < 3)
return;
srb->result = SAM_STAT_CHECK_CONDITION;
memcpy(srb->sense_buffer, record_not_found,
sizeof(record_not_found));
}
done:
if (srb->cmnd[0] != TEST_UNIT_READY)
us->last_sector_retries = 0;
}
int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf;
unsigned int transfer_length = scsi_bufflen(srb);
unsigned int residue;
int result;
int fake_sense = 0;
unsigned int cswlen;
unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
if (unlikely(us->fflags & US_FL_BULK32)) {
cbwlen = 32;
us->iobuf[31] = 0;
}
bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
bcb->DataTransferLength = cpu_to_le32(transfer_length);
bcb->Flags = srb->sc_data_direction == DMA_FROM_DEVICE ?
US_BULK_FLAG_IN : 0;
bcb->Tag = ++us->tag;
bcb->Lun = srb->device->lun;
if (us->fflags & US_FL_SCM_MULT_TARG)
bcb->Lun |= srb->device->id << 4;
bcb->Length = srb->cmd_len;
memset(bcb->CDB, 0, sizeof(bcb->CDB));
memcpy(bcb->CDB, srb->cmnd, bcb->Length);
US_DEBUGP("Bulk Command S 0x%x T 0x%x L %d F %d Trg %d LUN %d CL %d\n",
le32_to_cpu(bcb->Signature), bcb->Tag,
le32_to_cpu(bcb->DataTransferLength), bcb->Flags,
(bcb->Lun >> 4), (bcb->Lun & 0x0F),
bcb->Length);
result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
bcb, cbwlen, NULL);
US_DEBUGP("Bulk command transfer result=%d\n", result);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (unlikely(us->fflags & US_FL_GO_SLOW))
udelay(125);
if (transfer_length) {
unsigned int pipe = srb->sc_data_direction == DMA_FROM_DEVICE ?
us->recv_bulk_pipe : us->send_bulk_pipe;
result = usb_stor_bulk_srb(us, pipe, srb);
US_DEBUGP("Bulk data transfer result 0x%x\n", result);
if (result == USB_STOR_XFER_ERROR)
return USB_STOR_TRANSPORT_ERROR;
if (result == USB_STOR_XFER_LONG)
fake_sense = 1;
}
US_DEBUGP("Attempting to get CSW...\n");
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
bcs, US_BULK_CS_WRAP_LEN, &cswlen);
if (result == USB_STOR_XFER_SHORT && cswlen == 0) {
US_DEBUGP("Received 0-length CSW; retrying...\n");
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
bcs, US_BULK_CS_WRAP_LEN, &cswlen);
}
if (result == USB_STOR_XFER_STALLED) {
US_DEBUGP("Attempting to get CSW (2nd try)...\n");
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
bcs, US_BULK_CS_WRAP_LEN, NULL);
}
US_DEBUGP("Bulk status result = %d\n", result);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
residue = le32_to_cpu(bcs->Residue);
US_DEBUGP("Bulk Status S 0x%x T 0x%x R %u Stat 0x%x\n",
le32_to_cpu(bcs->Signature), bcs->Tag,
residue, bcs->Status);
if (!(bcs->Tag == us->tag || (us->fflags & US_FL_BULK_IGNORE_TAG)) ||
bcs->Status > US_BULK_STAT_PHASE) {
US_DEBUGP("Bulk logical error\n");
return USB_STOR_TRANSPORT_ERROR;
}
if (!us->bcs_signature) {
us->bcs_signature = bcs->Signature;
if (us->bcs_signature != cpu_to_le32(US_BULK_CS_SIGN))
US_DEBUGP("Learnt BCS signature 0x%08X\n",
le32_to_cpu(us->bcs_signature));
} else if (bcs->Signature != us->bcs_signature) {
US_DEBUGP("Signature mismatch: got %08X, expecting %08X\n",
le32_to_cpu(bcs->Signature),
le32_to_cpu(us->bcs_signature));
return USB_STOR_TRANSPORT_ERROR;
}
if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE)) {
if (bcs->Status == US_BULK_STAT_OK &&
scsi_get_resid(srb) == 0 &&
((srb->cmnd[0] == INQUIRY &&
transfer_length == 36) ||
(srb->cmnd[0] == READ_CAPACITY &&
transfer_length == 8))) {
us->fflags |= US_FL_IGNORE_RESIDUE;
} else {
residue = min(residue, transfer_length);
scsi_set_resid(srb, max(scsi_get_resid(srb),
(int) residue));
}
}
switch (bcs->Status) {
case US_BULK_STAT_OK:
if (fake_sense) {
memcpy(srb->sense_buffer,
usb_stor_sense_invalidCDB,
sizeof(usb_stor_sense_invalidCDB));
return USB_STOR_TRANSPORT_NO_SENSE;
}
return USB_STOR_TRANSPORT_GOOD;
case US_BULK_STAT_FAIL:
return USB_STOR_TRANSPORT_FAILED;
case US_BULK_STAT_PHASE:
return USB_STOR_TRANSPORT_ERROR;
}
return USB_STOR_TRANSPORT_ERROR;
}
void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int need_auto_sense;
int result;
scsi_set_resid(srb, 0);
result = us->transport(srb, us);
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
US_DEBUGP("-- command was aborted\n");
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
if (result == USB_STOR_TRANSPORT_ERROR) {
US_DEBUGP("-- transport indicates error, resetting\n");
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
last_sector_hacks(us, srb);
return;
}
srb->result = SAM_STAT_GOOD;
need_auto_sense = 0;
if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_DPCM_USB) &&
srb->sc_data_direction != DMA_FROM_DEVICE) {
US_DEBUGP("-- CB transport device requiring auto-sense\n");
need_auto_sense = 1;
}
if (result == USB_STOR_TRANSPORT_FAILED) {
US_DEBUGP("-- transport indicates command failure\n");
need_auto_sense = 1;
}
if (unlikely((srb->cmnd[0] == ATA_16 || srb->cmnd[0] == ATA_12) &&
result == USB_STOR_TRANSPORT_GOOD &&
!(us->fflags & US_FL_SANE_SENSE) &&
!(us->fflags & US_FL_BAD_SENSE) &&
!(srb->cmnd[2] & 0x20))) {
US_DEBUGP("-- SAT supported, increasing auto-sense\n");
us->fflags |= US_FL_SANE_SENSE;
}
if ((scsi_get_resid(srb) > 0) &&
!((srb->cmnd[0] == REQUEST_SENSE) ||
(srb->cmnd[0] == INQUIRY) ||
(srb->cmnd[0] == MODE_SENSE) ||
(srb->cmnd[0] == LOG_SENSE) ||
(srb->cmnd[0] == MODE_SENSE_10))) {
US_DEBUGP("-- unexpectedly short transfer\n");
}
if (need_auto_sense) {
int temp_result;
struct scsi_eh_save ses;
int sense_size = US_SENSE_SIZE;
struct scsi_sense_hdr sshdr;
const u8 *scdd;
u8 fm_ili;
if (us->fflags & US_FL_SANE_SENSE)
sense_size = ~0;
Retry_Sense:
US_DEBUGP("Issuing auto-REQUEST_SENSE\n");
scsi_eh_prep_cmnd(srb, &ses, NULL, 0, sense_size);
if (us->subclass == USB_SC_RBC || us->subclass == USB_SC_SCSI ||
us->subclass == USB_SC_CYP_ATACB)
srb->cmd_len = 6;
else
srb->cmd_len = 12;
scsi_set_resid(srb, 0);
temp_result = us->transport(us->srb, us);
scsi_eh_restore_cmnd(srb, &ses);
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
US_DEBUGP("-- auto-sense aborted\n");
srb->result = DID_ABORT << 16;
if (sense_size != US_SENSE_SIZE) {
us->fflags &= ~US_FL_SANE_SENSE;
us->fflags |= US_FL_BAD_SENSE;
}
goto Handle_Errors;
}
if (temp_result == USB_STOR_TRANSPORT_FAILED &&
sense_size != US_SENSE_SIZE) {
US_DEBUGP("-- auto-sense failure, retry small sense\n");
sense_size = US_SENSE_SIZE;
us->fflags &= ~US_FL_SANE_SENSE;
us->fflags |= US_FL_BAD_SENSE;
goto Retry_Sense;
}
if (temp_result != USB_STOR_TRANSPORT_GOOD) {
US_DEBUGP("-- auto-sense failure\n");
srb->result = DID_ERROR << 16;
if (!(us->fflags & US_FL_SCM_MULT_TARG))
goto Handle_Errors;
return;
}
if (srb->sense_buffer[7] > (US_SENSE_SIZE - 8) &&
!(us->fflags & US_FL_SANE_SENSE) &&
!(us->fflags & US_FL_BAD_SENSE) &&
(srb->sense_buffer[0] & 0x7C) == 0x70) {
US_DEBUGP("-- SANE_SENSE support enabled\n");
us->fflags |= US_FL_SANE_SENSE;
US_DEBUGP("-- Sense data truncated to %i from %i\n",
US_SENSE_SIZE,
srb->sense_buffer[7] + 8);
srb->sense_buffer[7] = (US_SENSE_SIZE - 8);
}
scsi_normalize_sense(srb->sense_buffer, SCSI_SENSE_BUFFERSIZE,
&sshdr);
US_DEBUGP("-- Result from auto-sense is %d\n", temp_result);
US_DEBUGP("-- code: 0x%x, key: 0x%x, ASC: 0x%x, ASCQ: 0x%x\n",
sshdr.response_code, sshdr.sense_key,
sshdr.asc, sshdr.ascq);
#ifdef CONFIG_USB_STORAGE_DEBUG
usb_stor_show_sense(sshdr.sense_key, sshdr.asc, sshdr.ascq);
#endif
srb->result = SAM_STAT_CHECK_CONDITION;
scdd = scsi_sense_desc_find(srb->sense_buffer,
SCSI_SENSE_BUFFERSIZE, 4);
fm_ili = (scdd ? scdd[3] : srb->sense_buffer[2]) & 0xA0;
if (sshdr.sense_key == 0 && sshdr.asc == 0 && sshdr.ascq == 0 &&
fm_ili == 0) {
if (result == USB_STOR_TRANSPORT_GOOD) {
srb->result = SAM_STAT_GOOD;
srb->sense_buffer[0] = 0x0;
} else {
srb->result = DID_ERROR << 16;
if ((sshdr.response_code & 0x72) == 0x72)
srb->sense_buffer[1] = HARDWARE_ERROR;
else
srb->sense_buffer[2] = HARDWARE_ERROR;
}
}
}
if (unlikely((us->fflags & US_FL_INITIAL_READ10) &&
srb->cmnd[0] == READ_10)) {
if (srb->result == SAM_STAT_GOOD) {
set_bit(US_FLIDX_READ10_WORKED, &us->dflags);
} else if (test_bit(US_FLIDX_READ10_WORKED, &us->dflags)) {
clear_bit(US_FLIDX_READ10_WORKED, &us->dflags);
set_bit(US_FLIDX_REDO_READ10, &us->dflags);
}
if (test_bit(US_FLIDX_REDO_READ10, &us->dflags)) {
clear_bit(US_FLIDX_REDO_READ10, &us->dflags);
srb->result = DID_IMM_RETRY << 16;
srb->sense_buffer[0] = 0;
}
}
if ((srb->result == SAM_STAT_GOOD || srb->sense_buffer[2] == 0) &&
scsi_bufflen(srb) - scsi_get_resid(srb) < srb->underflow)
srb->result = DID_ERROR << 16;
last_sector_hacks(us, srb);
return;
Handle_Errors:
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->dflags);
clear_bit(US_FLIDX_ABORTING, &us->dflags);
scsi_unlock(us_to_host(us));
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->dflags);
last_sector_hacks(us, srb);
}
/*
* ENE_SendScsiCmd():
*/
int ENE_SendScsiCmd(struct us_data *us, BYTE fDir, void *buf, int use_sg)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf;
int result;
unsigned int transfer_length = bcb->DataTransferLength,
cswlen = 0, partial = 0;
unsigned int residue;
/* printk(KERN_INFO "transport --- ENE_SendScsiCmd\n"); */
/* send cmd to out endpoint */
result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
bcb, US_BULK_CB_WRAP_LEN, NULL);
if (result != USB_STOR_XFER_GOOD) {
printk(KERN_ERR "send cmd to out endpoint fail ---\n");
return USB_STOR_TRANSPORT_ERROR;
}
if (buf) {
unsigned int pipe = fDir;
if (fDir == FDIR_READ)
pipe = us->recv_bulk_pipe;
else
pipe = us->send_bulk_pipe;
/* Bulk */
if (use_sg)
result = usb_stor_bulk_srb(us, pipe, us->srb);
else
result = usb_stor_bulk_transfer_sg(us, pipe, buf,
transfer_length, 0, &partial);
if (result != USB_STOR_XFER_GOOD) {
printk(KERN_ERR "data transfer fail ---\n");
return USB_STOR_TRANSPORT_ERROR;
}
}
/* Get CSW for device status */
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
US_BULK_CS_WRAP_LEN, &cswlen);
if (result == USB_STOR_XFER_SHORT && cswlen == 0) {
printk(KERN_WARNING "Received 0-length CSW; retrying...\n");
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
bcs, US_BULK_CS_WRAP_LEN, &cswlen);
}
if (result == USB_STOR_XFER_STALLED) {
/* get the status again */
printk(KERN_WARNING "Attempting to get CSW (2nd try)...\n");
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
bcs, US_BULK_CS_WRAP_LEN, NULL);
}
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
/* check bulk status */
residue = le32_to_cpu(bcs->Residue);
/*
* try to compute the actual residue, based on how much data
* was really transferred and what the device tells us
*/
if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE)) {
residue = min(residue, transfer_length);
if (us->srb)
scsi_set_resid(us->srb, max(scsi_get_resid(us->srb),
(int) residue));
}
if (bcs->Status != US_BULK_STAT_OK)
return USB_STOR_TRANSPORT_ERROR;
return USB_STOR_TRANSPORT_GOOD;
}
static void sas_scsi_task_done(struct sas_task *task)
{
struct task_status_struct *ts = &task->task_status;
struct scsi_cmnd *sc = task->uldd_task;
int hs = 0, stat = 0;
if (unlikely(task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
/* Aborted tasks will be completed by the error handler */
SAS_DPRINTK("task done but aborted\n");
return;
}
if (unlikely(!sc)) {
SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n");
list_del_init(&task->list);
sas_free_task(task);
return;
}
if (ts->resp == SAS_TASK_UNDELIVERED) {
/* transport error */
hs = DID_NO_CONNECT;
} else { /* ts->resp == SAS_TASK_COMPLETE */
/* task delivered, what happened afterwards? */
switch (ts->stat) {
case SAS_DEV_NO_RESPONSE:
case SAS_INTERRUPTED:
case SAS_PHY_DOWN:
case SAS_NAK_R_ERR:
case SAS_OPEN_TO:
hs = DID_NO_CONNECT;
break;
case SAS_DATA_UNDERRUN:
scsi_set_resid(sc, ts->residual);
if (scsi_bufflen(sc) - scsi_get_resid(sc) < sc->underflow)
hs = DID_ERROR;
break;
case SAS_DATA_OVERRUN:
hs = DID_ERROR;
break;
case SAS_QUEUE_FULL:
hs = DID_SOFT_ERROR; /* retry */
break;
case SAS_DEVICE_UNKNOWN:
hs = DID_BAD_TARGET;
break;
case SAS_SG_ERR:
hs = DID_PARITY;
break;
case SAS_OPEN_REJECT:
if (ts->open_rej_reason == SAS_OREJ_RSVD_RETRY)
hs = DID_SOFT_ERROR; /* retry */
else
hs = DID_ERROR;
break;
case SAS_PROTO_RESPONSE:
SAS_DPRINTK("LLDD:%s sent SAS_PROTO_RESP for an SSP "
"task; please report this\n",
task->dev->port->ha->sas_ha_name);
break;
case SAS_ABORTED_TASK:
hs = DID_ABORT;
break;
case SAM_STAT_CHECK_CONDITION:
memcpy(sc->sense_buffer, ts->buf,
min(SCSI_SENSE_BUFFERSIZE, ts->buf_valid_size));
stat = SAM_STAT_CHECK_CONDITION;
break;
default:
stat = ts->stat;
break;
}
}
ASSIGN_SAS_TASK(sc, NULL);
sc->result = (hs << 16) | stat;
list_del_init(&task->list);
sas_free_task(task);
sc->scsi_done(sc);
}
/* There are so many devices that report the capacity incorrectly,
* this routine was written to counteract some of the resulting
* problems.
*/
static void last_sector_hacks(struct us_data *us, struct scsi_cmnd *srb)
{
struct gendisk *disk;
struct scsi_disk *sdkp;
u32 sector;
/* To Report "Medium Error: Record Not Found */
static unsigned char record_not_found[18] = {
[0] = 0x70, /* current error */
[2] = MEDIUM_ERROR, /* = 0x03 */
[7] = 0x0a, /* additional length */
[12] = 0x14 /* Record Not Found */
};
/* If last-sector problems can't occur, whether because the
* capacity was already decremented or because the device is
* known to report the correct capacity, then we don't need
* to do anything.
*/
if (!us->use_last_sector_hacks)
return;
/* Was this command a READ(10) or a WRITE(10)? */
if (srb->cmnd[0] != READ_10 && srb->cmnd[0] != WRITE_10)
goto done;
/* Did this command access the last sector? */
sector = (srb->cmnd[2] << 24) | (srb->cmnd[3] << 16) |
(srb->cmnd[4] << 8) | (srb->cmnd[5]);
disk = srb->request->rq_disk;
if (!disk)
goto done;
sdkp = scsi_disk(disk);
if (!sdkp)
goto done;
if (sector + 1 != sdkp->capacity)
goto done;
if (srb->result == SAM_STAT_GOOD && scsi_get_resid(srb) == 0) {
/* The command succeeded. We know this device doesn't
* have the last-sector bug, so stop checking it.
*/
us->use_last_sector_hacks = 0;
} else {
/* The command failed. Allow up to 3 retries in case this
* is some normal sort of failure. After that, assume the
* capacity is wrong and we're trying to access the sector
* beyond the end. Replace the result code and sense data
* with values that will cause the SCSI core to fail the
* command immediately, instead of going into an infinite
* (or even just a very long) retry loop.
*/
if (++us->last_sector_retries < 3)
return;
srb->result = SAM_STAT_CHECK_CONDITION;
memcpy(srb->sense_buffer, record_not_found,
sizeof(record_not_found));
}
done:
/* Don't reset the retry counter for TEST UNIT READY commands,
* because they get issued after device resets which might be
* caused by a failed last-sector access.
*/
if (srb->cmnd[0] != TEST_UNIT_READY)
us->last_sector_retries = 0;
}
/* Invoke the transport and basic error-handling/recovery methods
*
* This is used by the protocol layers to actually send the message to
* the device and receive the response.
*/
void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int need_auto_sense;
int result;
/* send the command to the transport layer */
scsi_set_resid(srb, 0);
result = us->transport(srb, us);
/* if the command gets aborted by the higher layers, we need to
* short-circuit all other processing
*/
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
US_DEBUGP("-- command was aborted\n");
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
/* if there is a transport error, reset and don't auto-sense */
if (result == USB_STOR_TRANSPORT_ERROR) {
US_DEBUGP("-- transport indicates error, resetting\n");
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
last_sector_hacks(us, srb);
return;
}
srb->result = SAM_STAT_GOOD;
/* Determine if we need to auto-sense
*
* I normally don't use a flag like this, but it's almost impossible
* to understand what's going on here if I don't.
*/
need_auto_sense = 0;
/*
* If we're running the CB transport, which is incapable
* of determining status on its own, we will auto-sense
* unless the operation involved a data-in transfer. Devices
* can signal most data-in errors by stalling the bulk-in pipe.
*/
if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_DPCM_USB) &&
srb->sc_data_direction != DMA_FROM_DEVICE) {
US_DEBUGP("-- CB transport device requiring auto-sense\n");
need_auto_sense = 1;
}
/*
* If we have a failure, we're going to do a REQUEST_SENSE
* automatically. Note that we differentiate between a command
* "failure" and an "error" in the transport mechanism.
*/
if (result == USB_STOR_TRANSPORT_FAILED) {
US_DEBUGP("-- transport indicates command failure\n");
need_auto_sense = 1;
}
/*
* Determine if this device is SAT by seeing if the
* command executed successfully. Otherwise we'll have
* to wait for at least one CHECK_CONDITION to determine
* SANE_SENSE support
*/
if (unlikely((srb->cmnd[0] == ATA_16 || srb->cmnd[0] == ATA_12) &&
result == USB_STOR_TRANSPORT_GOOD &&
!(us->fflags & US_FL_SANE_SENSE) &&
!(us->fflags & US_FL_BAD_SENSE) &&
!(srb->cmnd[2] & 0x20))) {
US_DEBUGP("-- SAT supported, increasing auto-sense\n");
us->fflags |= US_FL_SANE_SENSE;
}
/*
* A short transfer on a command where we don't expect it
* is unusual, but it doesn't mean we need to auto-sense.
*/
if ((scsi_get_resid(srb) > 0) &&
!((srb->cmnd[0] == REQUEST_SENSE) ||
(srb->cmnd[0] == INQUIRY) ||
(srb->cmnd[0] == MODE_SENSE) ||
(srb->cmnd[0] == LOG_SENSE) ||
(srb->cmnd[0] == MODE_SENSE_10))) {
US_DEBUGP("-- unexpectedly short transfer\n");
}
/* Now, if we need to do the auto-sense, let's do it */
if (need_auto_sense) {
int temp_result;
struct scsi_eh_save ses;
int sense_size = US_SENSE_SIZE;
struct scsi_sense_hdr sshdr;
const u8 *scdd;
u8 fm_ili;
/* device supports and needs bigger sense buffer */
if (us->fflags & US_FL_SANE_SENSE)
sense_size = ~0;
Retry_Sense:
US_DEBUGP("Issuing auto-REQUEST_SENSE\n");
scsi_eh_prep_cmnd(srb, &ses, NULL, 0, sense_size);
/* FIXME: we must do the protocol translation here */
if (us->subclass == USB_SC_RBC || us->subclass == USB_SC_SCSI ||
us->subclass == USB_SC_CYP_ATACB)
srb->cmd_len = 6;
else
srb->cmd_len = 12;
/* issue the auto-sense command */
scsi_set_resid(srb, 0);
temp_result = us->transport(us->srb, us);
/* let's clean up right away */
scsi_eh_restore_cmnd(srb, &ses);
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
US_DEBUGP("-- auto-sense aborted\n");
srb->result = DID_ABORT << 16;
/* If SANE_SENSE caused this problem, disable it */
if (sense_size != US_SENSE_SIZE) {
us->fflags &= ~US_FL_SANE_SENSE;
us->fflags |= US_FL_BAD_SENSE;
}
goto Handle_Errors;
}
/* Some devices claim to support larger sense but fail when
* trying to request it. When a transport failure happens
* using US_FS_SANE_SENSE, we always retry with a standard
* (small) sense request. This fixes some USB GSM modems
*/
if (temp_result == USB_STOR_TRANSPORT_FAILED &&
sense_size != US_SENSE_SIZE) {
US_DEBUGP("-- auto-sense failure, retry small sense\n");
sense_size = US_SENSE_SIZE;
us->fflags &= ~US_FL_SANE_SENSE;
us->fflags |= US_FL_BAD_SENSE;
goto Retry_Sense;
}
/* Other failures */
if (temp_result != USB_STOR_TRANSPORT_GOOD) {
US_DEBUGP("-- auto-sense failure\n");
/* we skip the reset if this happens to be a
* multi-target device, since failure of an
* auto-sense is perfectly valid
*/
srb->result = DID_ERROR << 16;
if (!(us->fflags & US_FL_SCM_MULT_TARG))
goto Handle_Errors;
return;
}
/* If the sense data returned is larger than 18-bytes then we
* assume this device supports requesting more in the future.
* The response code must be 70h through 73h inclusive.
*/
if (srb->sense_buffer[7] > (US_SENSE_SIZE - 8) &&
!(us->fflags & US_FL_SANE_SENSE) &&
!(us->fflags & US_FL_BAD_SENSE) &&
(srb->sense_buffer[0] & 0x7C) == 0x70) {
US_DEBUGP("-- SANE_SENSE support enabled\n");
us->fflags |= US_FL_SANE_SENSE;
/* Indicate to the user that we truncated their sense
* because we didn't know it supported larger sense.
*/
US_DEBUGP("-- Sense data truncated to %i from %i\n",
US_SENSE_SIZE,
srb->sense_buffer[7] + 8);
srb->sense_buffer[7] = (US_SENSE_SIZE - 8);
}
scsi_normalize_sense(srb->sense_buffer, SCSI_SENSE_BUFFERSIZE,
&sshdr);
US_DEBUGP("-- Result from auto-sense is %d\n", temp_result);
US_DEBUGP("-- code: 0x%x, key: 0x%x, ASC: 0x%x, ASCQ: 0x%x\n",
sshdr.response_code, sshdr.sense_key,
sshdr.asc, sshdr.ascq);
#ifdef CONFIG_USB_STORAGE_DEBUG
usb_stor_show_sense(sshdr.sense_key, sshdr.asc, sshdr.ascq);
#endif
/* set the result so the higher layers expect this data */
srb->result = SAM_STAT_CHECK_CONDITION;
scdd = scsi_sense_desc_find(srb->sense_buffer,
SCSI_SENSE_BUFFERSIZE, 4);
fm_ili = (scdd ? scdd[3] : srb->sense_buffer[2]) & 0xA0;
/* We often get empty sense data. This could indicate that
* everything worked or that there was an unspecified
* problem. We have to decide which.
*/
if (sshdr.sense_key == 0 && sshdr.asc == 0 && sshdr.ascq == 0 &&
fm_ili == 0) {
/* If things are really okay, then let's show that.
* Zero out the sense buffer so the higher layers
* won't realize we did an unsolicited auto-sense.
*/
if (result == USB_STOR_TRANSPORT_GOOD) {
srb->result = SAM_STAT_GOOD;
srb->sense_buffer[0] = 0x0;
/* If there was a problem, report an unspecified
* hardware error to prevent the higher layers from
* entering an infinite retry loop.
*/
} else {
srb->result = DID_ERROR << 16;
if ((sshdr.response_code & 0x72) == 0x72)
srb->sense_buffer[1] = HARDWARE_ERROR;
else
srb->sense_buffer[2] = HARDWARE_ERROR;
}
}
}
/*
* Some devices don't work or return incorrect data the first
* time they get a READ(10) command, or for the first READ(10)
* after a media change. If the INITIAL_READ10 flag is set,
* keep track of whether READ(10) commands succeed. If the
* previous one succeeded and this one failed, set the REDO_READ10
* flag to force a retry.
*/
if (unlikely((us->fflags & US_FL_INITIAL_READ10) &&
srb->cmnd[0] == READ_10)) {
if (srb->result == SAM_STAT_GOOD) {
set_bit(US_FLIDX_READ10_WORKED, &us->dflags);
} else if (test_bit(US_FLIDX_READ10_WORKED, &us->dflags)) {
clear_bit(US_FLIDX_READ10_WORKED, &us->dflags);
set_bit(US_FLIDX_REDO_READ10, &us->dflags);
}
/*
* Next, if the REDO_READ10 flag is set, return a result
* code that will cause the SCSI core to retry the READ(10)
* command immediately.
*/
if (test_bit(US_FLIDX_REDO_READ10, &us->dflags)) {
clear_bit(US_FLIDX_REDO_READ10, &us->dflags);
srb->result = DID_IMM_RETRY << 16;
srb->sense_buffer[0] = 0;
}
}
/* Did we transfer less than the minimum amount required? */
if ((srb->result == SAM_STAT_GOOD || srb->sense_buffer[2] == 0) &&
scsi_bufflen(srb) - scsi_get_resid(srb) < srb->underflow)
srb->result = DID_ERROR << 16;
last_sector_hacks(us, srb);
return;
/* Error and abort processing: try to resynchronize with the device
* by issuing a port reset. If that fails, try a class-specific
* device reset. */
Handle_Errors:
/* Set the RESETTING bit, and clear the ABORTING bit so that
* the reset may proceed. */
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->dflags);
clear_bit(US_FLIDX_ABORTING, &us->dflags);
scsi_unlock(us_to_host(us));
/* We must release the device lock because the pre_reset routine
* will want to acquire it. */
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->dflags);
last_sector_hacks(us, srb);
}
static inline void nsp_inc_resid(struct scsi_cmnd *SCpnt, int residInc)
{
scsi_set_resid(SCpnt, scsi_get_resid(SCpnt) + residInc);
}
int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf;
unsigned int transfer_length = scsi_bufflen(srb);
unsigned int residue;
int result;
int fake_sense = 0;
unsigned int cswlen;
unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
/* Take care of BULK32 devices; set extra byte to 0 */
if (unlikely(us->fflags & US_FL_BULK32)) {
cbwlen = 32;
us->iobuf[31] = 0;
}
/* set up the command wrapper */
bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
bcb->DataTransferLength = cpu_to_le32(transfer_length);
bcb->Flags = srb->sc_data_direction == DMA_FROM_DEVICE ?
US_BULK_FLAG_IN : 0;
bcb->Tag = ++us->tag;
bcb->Lun = srb->device->lun;
if (us->fflags & US_FL_SCM_MULT_TARG)
bcb->Lun |= srb->device->id << 4;
bcb->Length = srb->cmd_len;
/* copy the command payload */
memset(bcb->CDB, 0, sizeof(bcb->CDB));
memcpy(bcb->CDB, srb->cmnd, bcb->Length);
/* send it to out endpoint */
US_DEBUGP("Bulk Command S 0x%x T 0x%x L %d F %d Trg %d LUN %d CL %d\n",
le32_to_cpu(bcb->Signature), bcb->Tag,
le32_to_cpu(bcb->DataTransferLength), bcb->Flags,
(bcb->Lun >> 4), (bcb->Lun & 0x0F),
bcb->Length);
result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
bcb, cbwlen, NULL);
US_DEBUGP("Bulk command transfer result=%d\n", result);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
/* DATA STAGE */
/* send/receive data payload, if there is any */
/* Some USB-IDE converter chips need a 100us delay between the
* command phase and the data phase. Some devices need a little
* more than that, probably because of clock rate inaccuracies. */
if (unlikely(us->fflags & US_FL_GO_SLOW))
udelay(125);
if (transfer_length) {
unsigned int pipe = srb->sc_data_direction == DMA_FROM_DEVICE ?
us->recv_bulk_pipe : us->send_bulk_pipe;
result = usb_stor_bulk_srb(us, pipe, srb);
US_DEBUGP("Bulk data transfer result 0x%x\n", result);
if (result == USB_STOR_XFER_ERROR)
return USB_STOR_TRANSPORT_ERROR;
/* If the device tried to send back more data than the
* amount requested, the spec requires us to transfer
* the CSW anyway. Since there's no point retrying the
* the command, we'll return fake sense data indicating
* Illegal Request, Invalid Field in CDB.
*/
if (result == USB_STOR_XFER_LONG)
fake_sense = 1;
/*
* Sometimes a device will mistakenly skip the data phase
* and go directly to the status phase without sending a
* zero-length packet. If we get a 13-byte response here,
* check whether it really is a CSW.
*/
if (result == USB_STOR_XFER_SHORT &&
srb->sc_data_direction == DMA_FROM_DEVICE &&
transfer_length - scsi_get_resid(srb) ==
US_BULK_CS_WRAP_LEN) {
struct scatterlist *sg = NULL;
unsigned int offset = 0;
if (usb_stor_access_xfer_buf((unsigned char *) bcs,
US_BULK_CS_WRAP_LEN, srb, &sg,
&offset, FROM_XFER_BUF) ==
US_BULK_CS_WRAP_LEN &&
bcs->Signature ==
cpu_to_le32(US_BULK_CS_SIGN)) {
US_DEBUGP("Device skipped data phase\n");
scsi_set_resid(srb, transfer_length);
goto skipped_data_phase;
}
}
}
/* See flow chart on pg 15 of the Bulk Only Transport spec for
* an explanation of how this code works.
*/
/* get CSW for device status */
US_DEBUGP("Attempting to get CSW...\n");
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
bcs, US_BULK_CS_WRAP_LEN, &cswlen);
/* Some broken devices add unnecessary zero-length packets to the
* end of their data transfers. Such packets show up as 0-length
* CSWs. If we encounter such a thing, try to read the CSW again.
*/
if (result == USB_STOR_XFER_SHORT && cswlen == 0) {
US_DEBUGP("Received 0-length CSW; retrying...\n");
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
bcs, US_BULK_CS_WRAP_LEN, &cswlen);
}
/* did the attempt to read the CSW fail? */
if (result == USB_STOR_XFER_STALLED) {
/* get the status again */
US_DEBUGP("Attempting to get CSW (2nd try)...\n");
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
bcs, US_BULK_CS_WRAP_LEN, NULL);
}
/* if we still have a failure at this point, we're in trouble */
US_DEBUGP("Bulk status result = %d\n", result);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
skipped_data_phase:
/* check bulk status */
residue = le32_to_cpu(bcs->Residue);
US_DEBUGP("Bulk Status S 0x%x T 0x%x R %u Stat 0x%x\n",
le32_to_cpu(bcs->Signature), bcs->Tag,
residue, bcs->Status);
if (!(bcs->Tag == us->tag || (us->fflags & US_FL_BULK_IGNORE_TAG)) ||
bcs->Status > US_BULK_STAT_PHASE) {
US_DEBUGP("Bulk logical error\n");
return USB_STOR_TRANSPORT_ERROR;
}
/* Some broken devices report odd signatures, so we do not check them
* for validity against the spec. We store the first one we see,
* and check subsequent transfers for validity against this signature.
*/
if (!us->bcs_signature) {
us->bcs_signature = bcs->Signature;
if (us->bcs_signature != cpu_to_le32(US_BULK_CS_SIGN))
US_DEBUGP("Learnt BCS signature 0x%08X\n",
le32_to_cpu(us->bcs_signature));
} else if (bcs->Signature != us->bcs_signature) {
US_DEBUGP("Signature mismatch: got %08X, expecting %08X\n",
le32_to_cpu(bcs->Signature),
le32_to_cpu(us->bcs_signature));
return USB_STOR_TRANSPORT_ERROR;
}
/* try to compute the actual residue, based on how much data
* was really transferred and what the device tells us */
if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE)) {
/* Heuristically detect devices that generate bogus residues
* by seeing what happens with INQUIRY and READ CAPACITY
* commands.
*/
if (bcs->Status == US_BULK_STAT_OK &&
scsi_get_resid(srb) == 0 &&
((srb->cmnd[0] == INQUIRY &&
transfer_length == 36) ||
(srb->cmnd[0] == READ_CAPACITY &&
transfer_length == 8))) {
us->fflags |= US_FL_IGNORE_RESIDUE;
} else {
residue = min(residue, transfer_length);
scsi_set_resid(srb, max(scsi_get_resid(srb),
(int) residue));
}
}
/* based on the status code, we report good or bad */
switch (bcs->Status) {
case US_BULK_STAT_OK:
/* device babbled -- return fake sense data */
if (fake_sense) {
memcpy(srb->sense_buffer,
usb_stor_sense_invalidCDB,
sizeof(usb_stor_sense_invalidCDB));
return USB_STOR_TRANSPORT_NO_SENSE;
}
/* command good -- note that data could be short */
return USB_STOR_TRANSPORT_GOOD;
case US_BULK_STAT_FAIL:
/* command failed */
return USB_STOR_TRANSPORT_FAILED;
case US_BULK_STAT_PHASE:
/* phase error -- note that a transport reset will be
* invoked by the invoke_transport() function
*/
return USB_STOR_TRANSPORT_ERROR;
}
/* we should never get here, but if we do, we're in trouble */
return USB_STOR_TRANSPORT_ERROR;
}
/*
* usb_stor_Bulk_transport()
*/
int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf;
unsigned int transfer_length = scsi_bufflen(srb);
unsigned int residue;
int result;
int fake_sense = 0;
unsigned int cswlen;
unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
/* pr_info("transport --- usb_stor_Bulk_transport\n"); */
/* Take care of BULK32 devices; set extra byte to 0 */
if (unlikely(us->fflags & US_FL_BULK32)) {
cbwlen = 32;
us->iobuf[31] = 0;
}
/* set up the command wrapper */
bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
bcb->DataTransferLength = cpu_to_le32(transfer_length);
bcb->Flags = srb->sc_data_direction == DMA_FROM_DEVICE ? 1 << 7 : 0;
bcb->Tag = ++us->tag;
bcb->Lun = srb->device->lun;
if (us->fflags & US_FL_SCM_MULT_TARG)
bcb->Lun |= srb->device->id << 4;
bcb->Length = srb->cmd_len;
/* copy the command payload */
memset(bcb->CDB, 0, sizeof(bcb->CDB));
memcpy(bcb->CDB, srb->cmnd, bcb->Length);
/* send command */
/* send it to out endpoint */
/* pr_info("Bulk Command S 0x%x T 0x%x L %d F %d Trg %d LUN %d CL %d\n",
le32_to_cpu(bcb->Signature), bcb->Tag,
le32_to_cpu(bcb->DataTransferLength), bcb->Flags,
(bcb->Lun >> 4), (bcb->Lun & 0x0F),
bcb->Length); */
result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
bcb, cbwlen, NULL);
/* pr_info("Bulk command transfer result=%d\n", result); */
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (unlikely(us->fflags & US_FL_GO_SLOW))
udelay(125);
/* R/W data */
if (transfer_length) {
unsigned int pipe;
if (srb->sc_data_direction == DMA_FROM_DEVICE)
pipe = us->recv_bulk_pipe;
else
pipe = us->send_bulk_pipe;
result = usb_stor_bulk_srb(us, pipe, srb);
/* pr_info("Bulk data transfer result 0x%x\n", result); */
if (result == USB_STOR_XFER_ERROR)
return USB_STOR_TRANSPORT_ERROR;
if (result == USB_STOR_XFER_LONG)
fake_sense = 1;
}
/* get CSW for device status */
/* pr_info("Attempting to get CSW...\n"); */
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
US_BULK_CS_WRAP_LEN, &cswlen);
if (result == USB_STOR_XFER_SHORT && cswlen == 0) {
/* pr_info("Received 0-length CSW; retrying...\n"); */
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
US_BULK_CS_WRAP_LEN, &cswlen);
}
/* did the attempt to read the CSW fail? */
if (result == USB_STOR_XFER_STALLED) {
/* get the status again */
/* pr_info("Attempting to get CSW (2nd try)...\n"); */
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
US_BULK_CS_WRAP_LEN, NULL);
}
/* if we still have a failure at this point, we're in trouble */
/* pr_info("Bulk status result = %d\n", result); */
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
/* check bulk status */
residue = le32_to_cpu(bcs->Residue);
/* pr_info("Bulk Status S 0x%x T 0x%x R %u Stat 0x%x\n",
le32_to_cpu(bcs->Signature),
bcs->Tag, residue, bcs->Status); */
if (!(bcs->Tag == us->tag ||
(us->fflags & US_FL_BULK_IGNORE_TAG)) ||
bcs->Status > US_BULK_STAT_PHASE) {
/* pr_info("Bulk logical error\n"); */
return USB_STOR_TRANSPORT_ERROR;
}
if (!us->bcs_signature) {
us->bcs_signature = bcs->Signature;
/* if (us->bcs_signature != cpu_to_le32(US_BULK_CS_SIGN)) */
/* pr_info("Learnt BCS signature 0x%08X\n",
le32_to_cpu(us->bcs_signature)); */
} else if (bcs->Signature != us->bcs_signature) {
/* pr_info("Signature mismatch: got %08X, expecting %08X\n",
le32_to_cpu(bcs->Signature),
le32_to_cpu(us->bcs_signature)); */
return USB_STOR_TRANSPORT_ERROR;
}
/* try to compute the actual residue, based on how much data
* was really transferred and what the device tells us */
if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE)) {
/* Heuristically detect devices that generate bogus residues
* by seeing what happens with INQUIRY and READ CAPACITY
* commands.
*/
if (bcs->Status == US_BULK_STAT_OK &&
scsi_get_resid(srb) == 0 &&
((srb->cmnd[0] == INQUIRY &&
transfer_length == 36) ||
(srb->cmnd[0] == READ_CAPACITY &&
transfer_length == 8))) {
us->fflags |= US_FL_IGNORE_RESIDUE;
} else {
residue = min(residue, transfer_length);
scsi_set_resid(srb, max(scsi_get_resid(srb),
(int) residue));
}
}
/* based on the status code, we report good or bad */
switch (bcs->Status) {
case US_BULK_STAT_OK:
if (fake_sense) {
memcpy(srb->sense_buffer, usb_stor_sense_invalidCDB,
sizeof(usb_stor_sense_invalidCDB));
return USB_STOR_TRANSPORT_NO_SENSE;
}
return USB_STOR_TRANSPORT_GOOD;
case US_BULK_STAT_FAIL:
return USB_STOR_TRANSPORT_FAILED;
case US_BULK_STAT_PHASE:
return USB_STOR_TRANSPORT_ERROR;
}
return USB_STOR_TRANSPORT_ERROR;
}
/*
* ENE_stor_invoke_transport()
*/
void ENE_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int result = 0;
/* pr_info("transport --- ENE_stor_invoke_transport\n"); */
usb_stor_print_cmd(srb);
/* send the command to the transport layer */
scsi_set_resid(srb, 0);
if (!(us->MS_Status.Ready || us->SM_Status.Ready))
result = ENE_InitMedia(us);
if (us->Power_IsResum == true) {
result = ENE_InitMedia(us);
us->Power_IsResum = false;
}
if (us->MS_Status.Ready)
result = MS_SCSIIrp(us, srb);
if (us->SM_Status.Ready)
result = SM_SCSIIrp(us, srb);
/* if the command gets aborted by the higher layers,
we need to short-circuit all other processing */
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
/* pr_info("-- command was aborted\n"); */
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
/* if there is a transport error, reset and don't auto-sense */
if (result == USB_STOR_TRANSPORT_ERROR) {
/* pr_info("-- transport indicates error, resetting\n"); */
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
return;
}
srb->result = SAM_STAT_GOOD;
if (result == USB_STOR_TRANSPORT_FAILED) {
/* pr_info("-- transport indicates command failure\n"); */
/* need_auto_sense = 1; */
BuildSenseBuffer(srb, us->SrbStatus);
srb->result = SAM_STAT_CHECK_CONDITION;
}
/* Did we transfer less than the minimum amount required? */
if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) -
scsi_get_resid(srb) < srb->underflow)
srb->result = (DID_ERROR << 16);
/* v02 | (SUGGEST_RETRY << 24); */
return;
Handle_Errors:
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->dflags);
clear_bit(US_FLIDX_ABORTING, &us->dflags);
scsi_unlock(us_to_host(us));
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->dflags);
}
/*
* usb_stor_invoke_transport()
*/
void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int need_auto_sense;
int result;
/* pr_info("transport --- usb_stor_invoke_transport\n"); */
usb_stor_print_cmd(srb);
/* send the command to the transport layer */
scsi_set_resid(srb, 0);
result = us->transport(srb, us); /* usb_stor_Bulk_transport; */
/* if the command gets aborted by the higher layers,
we need to short-circuit all other processing */
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
/* pr_info("-- command was aborted\n"); */
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
/* if there is a transport error, reset and don't auto-sense */
if (result == USB_STOR_TRANSPORT_ERROR) {
/* pr_info("-- transport indicates error, resetting\n"); */
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
return;
}
srb->result = SAM_STAT_GOOD;
/* Determine if we need to auto-sense */
need_auto_sense = 0;
if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_DPCM_USB) &&
srb->sc_data_direction != DMA_FROM_DEVICE) {
/* pr_info("-- CB transport device requiring auto-sense\n"); */
need_auto_sense = 1;
}
if (result == USB_STOR_TRANSPORT_FAILED) {
/* pr_info("-- transport indicates command failure\n"); */
need_auto_sense = 1;
}
/* Now, if we need to do the auto-sense, let's do it */
if (need_auto_sense) {
int temp_result;
struct scsi_eh_save ses;
pr_info("Issuing auto-REQUEST_SENSE\n");
scsi_eh_prep_cmnd(srb, &ses, NULL, 0, US_SENSE_SIZE);
/* we must do the protocol translation here */
if (us->subclass == USB_SC_RBC ||
us->subclass == USB_SC_SCSI ||
us->subclass == USB_SC_CYP_ATACB) {
srb->cmd_len = 6;
} else {
srb->cmd_len = 12;
}
/* issue the auto-sense command */
scsi_set_resid(srb, 0);
temp_result = us->transport(us->srb, us);
/* let's clean up right away */
scsi_eh_restore_cmnd(srb, &ses);
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
/* pr_info("-- auto-sense aborted\n"); */
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
if (temp_result != USB_STOR_TRANSPORT_GOOD) {
/* pr_info("-- auto-sense failure\n"); */
srb->result = DID_ERROR << 16;
if (!(us->fflags & US_FL_SCM_MULT_TARG))
goto Handle_Errors;
return;
}
/* set the result so the higher layers expect this data */
srb->result = SAM_STAT_CHECK_CONDITION;
if (result == USB_STOR_TRANSPORT_GOOD &&
(srb->sense_buffer[2] & 0xaf) == 0 &&
srb->sense_buffer[12] == 0 &&
srb->sense_buffer[13] == 0) {
srb->result = SAM_STAT_GOOD;
srb->sense_buffer[0] = 0x0;
}
}
/* Did we transfer less than the minimum amount required? */
if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) -
scsi_get_resid(srb) < srb->underflow)
srb->result = (DID_ERROR << 16);
/* v02 | (SUGGEST_RETRY << 24); */
return;
Handle_Errors:
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->dflags);
clear_bit(US_FLIDX_ABORTING, &us->dflags);
scsi_unlock(us_to_host(us));
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->dflags);
}
/* Invoke the transport and basic error-handling/recovery methods
*
* This is used by the protocol layers to actually send the message to
* the device and receive the response.
*/
void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int need_auto_sense;
int result;
/* send the command to the transport layer */
scsi_set_resid(srb, 0);
result = us->transport(srb, us);
/* if the command gets aborted by the higher layers, we need to
* short-circuit all other processing
*/
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
US_DEBUGP("-- command was aborted\n");
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
/* if there is a transport error, reset and don't auto-sense */
if (result == USB_STOR_TRANSPORT_ERROR) {
US_DEBUGP("-- transport indicates error, resetting\n");
srb->result = DID_ERROR << 16;
goto Handle_Errors;
}
/* if the transport provided its own sense data, don't auto-sense */
if (result == USB_STOR_TRANSPORT_NO_SENSE) {
srb->result = SAM_STAT_CHECK_CONDITION;
last_sector_hacks(us, srb);
return;
}
srb->result = SAM_STAT_GOOD;
/* Determine if we need to auto-sense
*
* I normally don't use a flag like this, but it's almost impossible
* to understand what's going on here if I don't.
*/
need_auto_sense = 0;
/*
* If we're running the CB transport, which is incapable
* of determining status on its own, we will auto-sense
* unless the operation involved a data-in transfer. Devices
* can signal most data-in errors by stalling the bulk-in pipe.
*/
if ((us->protocol == US_PR_CB || us->protocol == US_PR_DPCM_USB) &&
srb->sc_data_direction != DMA_FROM_DEVICE) {
US_DEBUGP("-- CB transport device requiring auto-sense\n");
need_auto_sense = 1;
}
/*
* If we have a failure, we're going to do a REQUEST_SENSE
* automatically. Note that we differentiate between a command
* "failure" and an "error" in the transport mechanism.
*/
if (result == USB_STOR_TRANSPORT_FAILED) {
US_DEBUGP("-- transport indicates command failure\n");
need_auto_sense = 1;
}
/*
* A short transfer on a command where we don't expect it
* is unusual, but it doesn't mean we need to auto-sense.
*/
if ((scsi_get_resid(srb) > 0) &&
!((srb->cmnd[0] == REQUEST_SENSE) ||
(srb->cmnd[0] == INQUIRY) ||
(srb->cmnd[0] == MODE_SENSE) ||
(srb->cmnd[0] == LOG_SENSE) ||
(srb->cmnd[0] == MODE_SENSE_10))) {
US_DEBUGP("-- unexpectedly short transfer\n");
}
/* Now, if we need to do the auto-sense, let's do it */
if (need_auto_sense) {
int temp_result;
struct scsi_eh_save ses;
US_DEBUGP("Issuing auto-REQUEST_SENSE\n");
scsi_eh_prep_cmnd(srb, &ses, NULL, 0, US_SENSE_SIZE);
/* FIXME: we must do the protocol translation here */
if (us->subclass == US_SC_RBC || us->subclass == US_SC_SCSI ||
us->subclass == US_SC_CYP_ATACB)
srb->cmd_len = 6;
else
srb->cmd_len = 12;
/* issue the auto-sense command */
scsi_set_resid(srb, 0);
temp_result = us->transport(us->srb, us);
/* let's clean up right away */
scsi_eh_restore_cmnd(srb, &ses);
if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
US_DEBUGP("-- auto-sense aborted\n");
srb->result = DID_ABORT << 16;
goto Handle_Errors;
}
if (temp_result != USB_STOR_TRANSPORT_GOOD) {
US_DEBUGP("-- auto-sense failure\n");
/* we skip the reset if this happens to be a
* multi-target device, since failure of an
* auto-sense is perfectly valid
*/
srb->result = DID_ERROR << 16;
if (!(us->fflags & US_FL_SCM_MULT_TARG))
goto Handle_Errors;
return;
}
US_DEBUGP("-- Result from auto-sense is %d\n", temp_result);
US_DEBUGP("-- code: 0x%x, key: 0x%x, ASC: 0x%x, ASCQ: 0x%x\n",
srb->sense_buffer[0],
srb->sense_buffer[2] & 0xf,
srb->sense_buffer[12],
srb->sense_buffer[13]);
#ifdef CONFIG_USB_STORAGE_DEBUG
usb_stor_show_sense(
srb->sense_buffer[2] & 0xf,
srb->sense_buffer[12],
srb->sense_buffer[13]);
#endif
/* set the result so the higher layers expect this data */
srb->result = SAM_STAT_CHECK_CONDITION;
/* If things are really okay, then let's show that. Zero
* out the sense buffer so the higher layers won't realize
* we did an unsolicited auto-sense. */
if (result == USB_STOR_TRANSPORT_GOOD &&
/* Filemark 0, ignore EOM, ILI 0, no sense */
(srb->sense_buffer[2] & 0xaf) == 0 &&
/* No ASC or ASCQ */
srb->sense_buffer[12] == 0 &&
srb->sense_buffer[13] == 0) {
srb->result = SAM_STAT_GOOD;
srb->sense_buffer[0] = 0x0;
}
}
/* Did we transfer less than the minimum amount required? */
if (srb->result == SAM_STAT_GOOD &&
scsi_bufflen(srb) - scsi_get_resid(srb) < srb->underflow)
srb->result = (DID_ERROR << 16) | (SUGGEST_RETRY << 24);
last_sector_hacks(us, srb);
return;
/* Error and abort processing: try to resynchronize with the device
* by issuing a port reset. If that fails, try a class-specific
* device reset. */
Handle_Errors:
/* Set the RESETTING bit, and clear the ABORTING bit so that
* the reset may proceed. */
scsi_lock(us_to_host(us));
set_bit(US_FLIDX_RESETTING, &us->dflags);
clear_bit(US_FLIDX_ABORTING, &us->dflags);
scsi_unlock(us_to_host(us));
/* We must release the device lock because the pre_reset routine
* will want to acquire it. */
mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
mutex_lock(&us->dev_mutex);
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
scsi_unlock(us_to_host(us));
us->transport_reset(us);
}
clear_bit(US_FLIDX_RESETTING, &us->dflags);
last_sector_hacks(us, srb);
}
/**
* @fn __sm331_internal_cmd
* @brief transport SCSI Command from this driver.
* @param srb : SCSI command structure
* @param us_data : USB Storage device structure
* @param cmnd : Command Description
* @param cmnd_length : Length of Command Description
* @param reply_buf : Reply buffer
* @param reply_len : Length of reply buffer
* @param direction : DMA_BIDIRECTIONAL, DMA_TO_DEVICE, DMA_FROM_DEVICE, DMA_NONE
* @return success : 0 failure : not zero
* @date 2008/07/10
*/
int __sm331_internal_cmd(
struct scsi_cmnd *srb, void *us_data, __u8 *cmnd, __u8 cmnd_length,
void *reply_buf, unsigned int reply_len, int direction)
{
struct bulk_cb_wrap bcb;
struct bulk_cs_wrap bcs;
unsigned int transfer_length = reply_len;
unsigned int residue;
int resid;
int result;
int fake_sense = 0;
unsigned int cswlen;
unsigned int cbwlen = US_BULK_CB_WRAP_LEN;
struct us_data *us = (struct us_data *)us_data;
#ifdef SDOP_DEBUG
static int write_count = 0;
static int read_count = 0;
#endif //SDOP_DUBUG
/* set up the command wrapper */
bcb.Signature = cpu_to_le32(US_BULK_CB_SIGN);
bcb.DataTransferLength = cpu_to_le32(transfer_length);
bcb.Flags = direction == DMA_FROM_DEVICE ? 1 << 7 : 0;
bcb.Tag = ++us->tag;
bcb.Lun = srb->device->lun;
if (us->fflags & US_FL_SCM_MULT_TARG)
bcb.Lun |= srb->device->id << 4;
bcb.Length = cmnd_length;
/* copy the command payload */
memset(bcb.CDB, 0, sizeof(bcb.CDB));
memcpy(bcb.CDB, cmnd, cmnd_length);
/* send it to out endpoint */
US_DEBUGP("Bulk Command S 0x%x T 0x%x L %d F %d Trg %d LUN %d CL %d\n",
le32_to_cpu(bcb.Signature), bcb.Tag,
le32_to_cpu(bcb.DataTransferLength), bcb.Flags,
(bcb.Lun >> 4), (bcb.Lun & 0x0F),
bcb.Length);
result = __usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
&bcb, cbwlen, NULL, cmd_timeout * HZ);
US_DEBUGP("Bulk command transfer result=%d\n", result);
if (result == USB_STOR_XFER_TIMEOUT)
return SM331_TRANS_TIMEOUT;
else if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
#ifdef SDOP_DEBUG
if(cmnd[0] == WRITE_10 && write_timeout_num) {
write_timeout_num--;
wait_event_timeout(timeout_wq, 0, cmd_timeout*HZ);
return SM331_TRANS_TIMEOUT;
}
else if(cmnd[0] == READ_10 && read_timeout_num) {
read_timeout_num--;
wait_event_timeout(timeout_wq, 0, cmd_timeout*HZ);
return SM331_TRANS_TIMEOUT;
}
else if(cmnd[0] == WRITE_10 && write_timeout_interval) {
write_count++;
if(write_count >= write_timeout_interval) {
printk("write : dummy timeout : %d sec\n", cmd_timeout);
wait_event_timeout(timeout_wq, 0, cmd_timeout*HZ);
write_count = 0;
return SM331_TRANS_TIMEOUT;
}
}
else if(cmnd[0] == READ_10 && read_timeout_interval) {
read_count++;
if(read_count >= read_timeout_interval) {
printk("read : dummy timeout : %d sec\n", cmd_timeout);
wait_event_timeout(timeout_wq, 0, cmd_timeout*HZ);
read_count = 0;
return SM331_TRANS_TIMEOUT;
}
}
#endif //SDOP_DEBUG
/* DATA STAGE */
/* send/receive data payload, if there is any */
/* Some USB-IDE converter chips need a 100us delay between the
* command phase and the data phase. Some devices need a little
* more than that, probably because of clock rate inaccuracies. */
if (unlikely(us->fflags & US_FL_GO_SLOW))
udelay(125);
if (transfer_length) {
unsigned int pipe = direction == DMA_FROM_DEVICE ?
us->recv_bulk_pipe : us->send_bulk_pipe;
// result = usb_stor_bulk_srb(us, pipe, srb);
result = usb_stor_bulk_transfer_sg(us, pipe,
reply_buf, transfer_length,
0, &resid);
US_DEBUGP("Bulk data transfer result 0x%x\n", result);
if (result == USB_STOR_XFER_ERROR)
return USB_STOR_TRANSPORT_ERROR;
/* If the device tried to send back more data than the
* amount requested, the spec requires us to transfer
* the CSW anyway. Since there's no point retrying the
* the command, we'll return fake sense data indicating
* Illegal Request, Invalid Field in CDB.
*/
if (result == USB_STOR_XFER_LONG)
fake_sense = 1;
}
/* See flow chart on pg 15 of the Bulk Only Transport spec for
* an explanation of how this code works.
*/
/* get CSW for device status */
US_DEBUGP("Attempting to get CSW...\n");
result = __usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
&bcs, US_BULK_CS_WRAP_LEN, &cswlen, cmd_timeout * HZ);
/* Some broken devices add unnecessary zero-length packets to the
* end of their data transfers. Such packets show up as 0-length
* CSWs. If we encounter such a thing, try to read the CSW again.
*/
if (result == USB_STOR_XFER_SHORT && cswlen == 0) {
US_DEBUGP("Received 0-length CSW; retrying...\n");
result = __usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
&bcs, US_BULK_CS_WRAP_LEN, &cswlen, cmd_timeout * HZ);
}
/* did the attempt to read the CSW fail? */
if (result == USB_STOR_XFER_STALLED) {
/* get the status again */
US_DEBUGP("Attempting to get CSW (2nd try)...\n");
result = __usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
&bcs, US_BULK_CS_WRAP_LEN, NULL, cmd_timeout * HZ);
}
/* if we still have a failure at this point, we're in trouble */
US_DEBUGP("Bulk status result = %d\n", result);
if (result == USB_STOR_XFER_TIMEOUT)
return SM331_TRANS_TIMEOUT;
else if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
#ifdef SDOP_DEBUG
if(cmnd[0] == WRITE_10 && write_timeout_num) {
write_timeout_num--;
wait_event_timeout(timeout_wq, 0, cmd_timeout*HZ);
return SM331_TRANS_TIMEOUT;
}
else if(cmnd[0] == READ_10 && read_timeout_num) {
read_timeout_num--;
wait_event_timeout(timeout_wq, 0, cmd_timeout*HZ);
return SM331_TRANS_TIMEOUT;
}
else if(cmnd[0] == WRITE_10 && write_timeout_interval) {
write_count++;
if(write_count >= write_timeout_interval) {
printk("write : dummy timeout : %d sec\n", cmd_timeout);
wait_event_timeout(timeout_wq, 0, cmd_timeout*HZ);
write_count = 0;
return SM331_TRANS_TIMEOUT;
}
}
else if(cmnd[0] == READ_10 && read_timeout_interval) {
read_count++;
if(read_count >= read_timeout_interval) {
printk("read : dummy timeout : %d sec\n", cmd_timeout);
wait_event_timeout(timeout_wq, 0, cmd_timeout*HZ);
read_count = 0;
return SM331_TRANS_TIMEOUT;
}
}
#endif //SDOP_DEBUG
/* check bulk status */
residue = le32_to_cpu(bcs.Residue);
US_DEBUGP("Bulk Status S 0x%x T 0x%x R %u Stat 0x%x\n",
le32_to_cpu(bcs.Signature), bcs.Tag,
residue, bcs.Status);
if (!(bcs.Tag == us->tag || (us->fflags & US_FL_BULK_IGNORE_TAG)) ||
bcs.Status > US_BULK_STAT_PHASE) {
US_DEBUGP("Bulk logical error\n");
return USB_STOR_TRANSPORT_ERROR;
}
/* Some broken devices report odd signatures, so we do not check them
* for validity against the spec. We store the first one we see,
* and check subsequent transfers for validity against this signature.
*/
if (!us->bcs_signature) {
us->bcs_signature = bcs.Signature;
if (us->bcs_signature != cpu_to_le32(US_BULK_CS_SIGN))
US_DEBUGP("Learnt BCS signature 0x%08X\n",
le32_to_cpu(us->bcs_signature));
} else if (bcs.Signature != us->bcs_signature) {
US_DEBUGP("Signature mismatch: got %08X, expecting %08X\n",
le32_to_cpu(bcs.Signature),
le32_to_cpu(us->bcs_signature));
return USB_STOR_TRANSPORT_ERROR;
}
/* try to compute the actual residue, based on how much data
* was really transferred and what the device tells us */
if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE)) {
/* Heuristically detect devices that generate bogus residues
* by seeing what happens with INQUIRY and READ CAPACITY
* commands.
*/
if (bcs.Status == US_BULK_STAT_OK &&
scsi_get_resid(srb) == 0 &&
((cmnd[0] == INQUIRY &&
transfer_length == 36) ||
(cmnd[0] == READ_CAPACITY &&
transfer_length == 8))) {
us->fflags |= US_FL_IGNORE_RESIDUE;
} else {
residue = min(residue, transfer_length);
// scsi_set_resid(srb, max(scsi_get_resid(srb),
// (int) residue));
}
}
/* based on the status code, we report good or bad */
switch (bcs.Status) {
case US_BULK_STAT_OK:
/* device babbled -- return fake sense data */
if (fake_sense) {
return USB_STOR_TRANSPORT_NO_SENSE;
}
/* command good -- note that data could be short */
return USB_STOR_TRANSPORT_GOOD;
case US_BULK_STAT_FAIL:
/* command failed */
return USB_STOR_TRANSPORT_FAILED;
case US_BULK_STAT_PHASE:
/* phase error -- note that a transport reset will be
* invoked by the invoke_transport() function
*/
return USB_STOR_TRANSPORT_ERROR;
}
/* we should never get here, but if we do, we're in trouble */
return USB_STOR_TRANSPORT_ERROR;
}
