/* 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");
#ifdef CONFIG_USB_STORAGE_DETECT
printk(KERN_INFO "usb storage -- command was aborted\n");
#endif
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");
#ifdef CONFIG_USB_STORAGE_DETECT
printk(KERN_INFO "usb storage -- transport indicates error, resetting\n");
#endif
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");
#ifdef CONFIG_USB_STORAGE_DETECT
printk(KERN_INFO "usb storage -- auto-sense aborted\n");
#endif
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");
#ifdef CONFIG_USB_STORAGE_DETECT
printk(KERN_INFO "usb storage -- auto-sense failure\n");
#endif
/* 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);
}
void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
{
struct scsi_cmnd *cmd = cp->cmd;
u_int cam_status, scsi_status, drv_status;
drv_status = 0;
cam_status = DID_OK;
scsi_status = cp->ssss_status;
if (cp->host_flags & HF_SENSE) {
scsi_status = cp->sv_scsi_status;
resid = cp->sv_resid;
if (sym_verbose && cp->sv_xerr_status)
sym_print_xerr(cmd, cp->sv_xerr_status);
if (cp->host_status == HS_COMPLETE &&
cp->ssss_status == S_GOOD &&
cp->xerr_status == 0) {
cam_status = sym_xerr_cam_status(DID_OK,
cp->sv_xerr_status);
drv_status = DRIVER_SENSE;
/*
* Bounce back the sense data to user.
*/
memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
memcpy(cmd->sense_buffer, cp->sns_bbuf,
min(SCSI_SENSE_BUFFERSIZE, SYM_SNS_BBUF_LEN));
#if 0
/*
* If the device reports a UNIT ATTENTION condition
* due to a RESET condition, we should consider all
* disconnect CCBs for this unit as aborted.
*/
if (1) {
u_char *p;
p = (u_char *) cmd->sense_data;
if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
sym_clear_tasks(np, DID_ABORT,
cp->target,cp->lun, -1);
}
#endif
} else {
/*
* Error return from our internal request sense. This
* is bad: we must clear the contingent allegiance
* condition otherwise the device will always return
* BUSY. Use a big stick.
*/
sym_reset_scsi_target(np, cmd->device->id);
cam_status = DID_ERROR;
}
} else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
cam_status = DID_OK;
else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
cam_status = DID_NO_CONNECT;
else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
cam_status = DID_ERROR;
else { /* Extended error */
if (sym_verbose) {
sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
cp->host_status, cp->ssss_status,
cp->xerr_status);
}
/*
* Set the most appropriate value for CAM status.
*/
cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
}
scsi_set_resid(cmd, resid);
cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
}
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;
}
/* 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;
/* 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;
}
/* record final status and free the task */
static void sas_end_task(struct scsi_cmnd *sc, struct sas_task *task)
{
struct task_status_struct *ts = &task->task_status;
int hs = 0, stat = 0;
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;
}
}
sc->result = (hs << 16) | stat;
ASSIGN_SAS_TASK(sc, NULL);
list_del_init(&task->list);
sas_free_task(task);
}
/* 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 || srb->sense_buffer[2] == 0) &&
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);
}
static void complete_scsi_command(CommandList_struct *c, int timeout,
__u32 tag)
{
struct scsi_cmnd *cmd;
ctlr_info_t *h;
ErrorInfo_struct *ei;
ei = c->err_info;
/* First, see if it was a message rather than a command */
if (c->Request.Type.Type == TYPE_MSG) {
c->cmd_type = CMD_MSG_DONE;
return;
}
cmd = (struct scsi_cmnd *) c->scsi_cmd;
h = hba[c->ctlr];
scsi_dma_unmap(cmd);
if (c->Header.SGTotal > h->max_cmd_sgentries)
cciss_unmap_sg_chain_block(h, c);
cmd->result = (DID_OK << 16); /* host byte */
cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
/* cmd->result |= (GOOD < 1); */ /* status byte */
cmd->result |= (ei->ScsiStatus);
/* printk("Scsistatus is 0x%02x\n", ei->ScsiStatus); */
/* copy the sense data whether we need to or not. */
memcpy(cmd->sense_buffer, ei->SenseInfo,
ei->SenseLen > SCSI_SENSE_BUFFERSIZE ?
SCSI_SENSE_BUFFERSIZE :
ei->SenseLen);
scsi_set_resid(cmd, ei->ResidualCnt);
if(ei->CommandStatus != 0)
{ /* an error has occurred */
switch(ei->CommandStatus)
{
case CMD_TARGET_STATUS:
/* Pass it up to the upper layers... */
if (!ei->ScsiStatus) {
/* Ordinarily, this case should never happen, but there is a bug
in some released firmware revisions that allows it to happen
if, for example, a 4100 backplane loses power and the tape
drive is in it. We assume that it's a fatal error of some
kind because we can't show that it wasn't. We will make it
look like selection timeout since that is the most common
reason for this to occur, and it's severe enough. */
cmd->result = DID_NO_CONNECT << 16;
}
break;
case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
break;
case CMD_DATA_OVERRUN:
dev_warn(&h->pdev->dev, "%p has"
" completed with data overrun "
"reported\n", c);
break;
case CMD_INVALID: {
/* print_bytes(c, sizeof(*c), 1, 0);
print_cmd(c); */
/* We get CMD_INVALID if you address a non-existent tape drive instead
of a selection timeout (no response). You will see this if you yank
out a tape drive, then try to access it. This is kind of a shame
because it means that any other CMD_INVALID (e.g. driver bug) will
get interpreted as a missing target. */
cmd->result = DID_NO_CONNECT << 16;
}
break;
case CMD_PROTOCOL_ERR:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev,
"%p has protocol error\n", c);
break;
case CMD_HARDWARE_ERR:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev,
"%p had hardware error\n", c);
break;
case CMD_CONNECTION_LOST:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev,
"%p had connection lost\n", c);
break;
case CMD_ABORTED:
cmd->result = DID_ABORT << 16;
dev_warn(&h->pdev->dev, "%p was aborted\n", c);
break;
case CMD_ABORT_FAILED:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev,
"%p reports abort failed\n", c);
break;
case CMD_UNSOLICITED_ABORT:
cmd->result = DID_ABORT << 16;
dev_warn(&h->pdev->dev, "%p aborted due to an "
"unsolicited abort\n", c);
break;
case CMD_TIMEOUT:
cmd->result = DID_TIME_OUT << 16;
dev_warn(&h->pdev->dev, "%p timedout\n", c);
break;
case CMD_UNABORTABLE:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev, "c %p command "
"unabortable\n", c);
break;
default:
cmd->result = DID_ERROR << 16;
dev_warn(&h->pdev->dev,
"%p returned unknown status %x\n", c,
ei->CommandStatus);
}
}
cmd->scsi_done(cmd);
scsi_cmd_free(h, c);
}
static int nsp_queuecommand(struct scsi_cmnd *SCpnt,
void (*done)(struct scsi_cmnd *))
{
#ifdef NSP_DEBUG
/*unsigned int host_id = SCpnt->device->host->this_id;*/
/*unsigned int base = SCpnt->device->host->io_port;*/
unsigned char target = scmd_id(SCpnt);
#endif
nsp_hw_data *data = (nsp_hw_data *)SCpnt->device->host->hostdata;
nsp_dbg(NSP_DEBUG_QUEUECOMMAND,
"SCpnt=0x%p target=%d lun=%d sglist=0x%p bufflen=%d sg_count=%d",
SCpnt, target, SCpnt->device->lun, scsi_sglist(SCpnt),
scsi_bufflen(SCpnt), scsi_sg_count(SCpnt));
//nsp_dbg(NSP_DEBUG_QUEUECOMMAND, "before CurrentSC=0x%p", data->CurrentSC);
SCpnt->scsi_done = done;
if (data->CurrentSC != NULL) {
nsp_msg(KERN_DEBUG, "CurrentSC!=NULL this can't be happen");
SCpnt->result = DID_BAD_TARGET << 16;
nsp_scsi_done(SCpnt);
return 0;
}
#if 0
/* XXX: pcmcia-cs generates SCSI command with "scsi_info" utility.
This makes kernel crash when suspending... */
if (data->ScsiInfo->stop != 0) {
nsp_msg(KERN_INFO, "suspending device. reject command.");
SCpnt->result = DID_BAD_TARGET << 16;
nsp_scsi_done(SCpnt);
return SCSI_MLQUEUE_HOST_BUSY;
}
#endif
show_command(SCpnt);
data->CurrentSC = SCpnt;
SCpnt->SCp.Status = CHECK_CONDITION;
SCpnt->SCp.Message = 0;
SCpnt->SCp.have_data_in = IO_UNKNOWN;
SCpnt->SCp.sent_command = 0;
SCpnt->SCp.phase = PH_UNDETERMINED;
scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
/* setup scratch area
SCp.ptr : buffer pointer
SCp.this_residual : buffer length
SCp.buffer : next buffer
SCp.buffers_residual : left buffers in list
SCp.phase : current state of the command */
if (scsi_bufflen(SCpnt)) {
SCpnt->SCp.buffer = scsi_sglist(SCpnt);
SCpnt->SCp.ptr = BUFFER_ADDR;
SCpnt->SCp.this_residual = SCpnt->SCp.buffer->length;
SCpnt->SCp.buffers_residual = scsi_sg_count(SCpnt) - 1;
} else {
SCpnt->SCp.ptr = NULL;
SCpnt->SCp.this_residual = 0;
SCpnt->SCp.buffer = NULL;
SCpnt->SCp.buffers_residual = 0;
}
if (nsphw_start_selection(SCpnt) == FALSE) {
nsp_dbg(NSP_DEBUG_QUEUECOMMAND, "selection fail");
SCpnt->result = DID_BUS_BUSY << 16;
nsp_scsi_done(SCpnt);
return 0;
}
//nsp_dbg(NSP_DEBUG_QUEUECOMMAND, "out");
#ifdef NSP_DEBUG
data->CmdId++;
#endif
return 0;
}
static inline void nsp_inc_resid(struct scsi_cmnd *SCpnt, int residInc)
{
scsi_set_resid(SCpnt, scsi_get_resid(SCpnt) + residInc);
}
/*
* 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(us, srb);
/* send the command to the transport layer */
scsi_set_resid(srb, 0);
if (!(us->SM_Status.Ready))
result = ENE_InitMedia(us);
if (us->Power_IsResum == true) {
result = ENE_InitMedia(us);
us->Power_IsResum = false;
}
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(us, 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);
}
