static void do_reset(struct Scsi_Host *);
/**
- * initialize_SCp - init the scsi pointer field
+ * initialize_SCp - init the scsi pointer field
* @cmd: command block to set up
*
* Set up the internal fields in the SCSI command.
reg, bit, val, wait);
}
-static struct {
- unsigned char value;
- const char *name;
-} phases[] __maybe_unused = {
- {PHASE_DATAOUT, "DATAOUT"},
- {PHASE_DATAIN, "DATAIN"},
- {PHASE_CMDOUT, "CMDOUT"},
- {PHASE_STATIN, "STATIN"},
- {PHASE_MSGOUT, "MSGOUT"},
- {PHASE_MSGIN, "MSGIN"},
- {PHASE_UNKNOWN, "UNKNOWN"}
-};
-
#if NDEBUG
static struct {
unsigned char mask;
{MR_TARGET, "MODE TARGET"},
{MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"},
{MR_ENABLE_PAR_INTR, "MODE PARITY INTR"},
+ {MR_ENABLE_EOP_INTR, "MODE EOP INTR"},
{MR_MONITOR_BSY, "MODE MONITOR BSY"},
{MR_DMA_MODE, "MODE DMA"},
{MR_ARBITRATE, "MODE ARBITRATION"},
};
/**
- * NCR5380_print - print scsi bus signals
- * @instance: adapter state to dump
+ * NCR5380_print - print scsi bus signals
+ * @instance: adapter state to dump
*
* Print the SCSI bus signals for debugging purposes
*/
printk("\n");
}
+static struct {
+ unsigned char value;
+ const char *name;
+} phases[] = {
+ {PHASE_DATAOUT, "DATAOUT"},
+ {PHASE_DATAIN, "DATAIN"},
+ {PHASE_CMDOUT, "CMDOUT"},
+ {PHASE_STATIN, "STATIN"},
+ {PHASE_MSGOUT, "MSGOUT"},
+ {PHASE_MSGIN, "MSGIN"},
+ {PHASE_UNKNOWN, "UNKNOWN"}
+};
/**
- * NCR5380_print_phase - show SCSI phase
+ * NCR5380_print_phase - show SCSI phase
* @instance: adapter to dump
*
* Print the current SCSI phase for debugging purposes
if (!(status & SR_REQ))
shost_printk(KERN_DEBUG, instance, "REQ not asserted, phase unknown.\n");
else {
- for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i);
+ for (i = 0; (phases[i].value != PHASE_UNKNOWN) &&
+ (phases[i].value != (status & PHASE_MASK)); ++i)
+ ;
shost_printk(KERN_DEBUG, instance, "phase %s\n", phases[i].name);
}
}
}
static int __maybe_unused NCR5380_show_info(struct seq_file *m,
- struct Scsi_Host *instance)
+ struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
#endif
/**
- * NCR5380_init - initialise an NCR5380
+ * NCR5380_init - initialise an NCR5380
* @instance: adapter to configure
* @flags: control flags
*
* with flags OR'd into the initial flags value.
*
* Notes : I assume that the host, hostno, and id bits have been
- * set correctly. I don't care about the irq and other fields.
+ * set correctly. I don't care about the irq and other fields.
*
* Returns 0 for success
*/
int i;
unsigned long deadline;
- if(in_interrupt())
- printk(KERN_ERR "NCR5380_init called with interrupts off!\n");
-
+ hostdata->host = instance;
hostdata->id_mask = 1 << instance->this_id;
+ hostdata->id_higher_mask = 0;
for (i = hostdata->id_mask; i <= 0x80; i <<= 1)
if (i > hostdata->id_mask)
hostdata->id_higher_mask |= i;
if (!hostdata->work_q)
return -ENOMEM;
- hostdata->host = instance;
-
prepare_info(instance);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
}
/**
- * NCR5380_exit - remove an NCR5380
+ * NCR5380_exit - remove an NCR5380
* @instance: adapter to remove
+ *
+ * Assumes that no more work can be queued (e.g. by NCR5380_intr).
*/
static void NCR5380_exit(struct Scsi_Host *instance)
cmd->scsi_done(cmd);
return 0;
}
-#endif /* (NDEBUG & NDEBUG_NO_WRITE) */
+#endif /* (NDEBUG & NDEBUG_NO_WRITE) */
cmd->result = 0;
}
/**
- * NCR5380_main - NCR state machines
+ * NCR5380_main - NCR state machines
*
* NCR5380_main is a coroutine that runs as long as more work can
* be done on the NCR5380 host adapters in a system. Both
udelay(3);
/* Check for lost arbitration */
- if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) || (NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) || (NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) {
+ if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) ||
+ (NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) ||
+ (NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) {
NCR5380_write(MODE_REG, MR_BASE);
dsprintk(NDEBUG_ARBITRATION, instance, "lost arbitration, deasserting MR_ARBITRATE\n");
spin_lock_irq(&hostdata->lock);
* The initiator shall then wait at least two deskew delays and release
* the BSY signal.
*/
- udelay(1); /* wingel -- wait two bus deskew delay >2*45ns */
+ udelay(1); /* wingel -- wait two bus deskew delay >2*45ns */
/* Reset BSY */
NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL));
* bytes to transfer, **data - pointer to data pointer.
*
* Returns : -1 when different phase is entered without transferring
- * maximum number of bytes, 0 if all bytes or transferred or exit
+ * maximum number of bytes, 0 if all bytes are transferred or exit
* is in same phase.
*
* Also, *phase, *count, *data are modified in place.
* counts, we will always do a pseudo DMA or DMA transfer.
*/
-static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data) {
+static int NCR5380_transfer_pio(struct Scsi_Host *instance,
+ unsigned char *phase, int *count,
+ unsigned char **data)
+{
unsigned char p = *phase, tmp;
int c = *count;
unsigned char *d = *data;
* REGISTER match the STATUS REGISTER
*/
- NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
+ NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
do {
/*
NCR5380_dprint_phase(NDEBUG_PIO, instance);
break;
}
+
/* Do actual transfer from SCSI bus to / from memory */
if (!(p & SR_IO))
NCR5380_write(OUTPUT_DATA_REG, *d);
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));
if (tmp != PHASE_MSGOUT) {
- NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
+ NCR5380_write(INITIATOR_COMMAND_REG,
+ ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, 0, 3 * HZ);
if (rc < 0)
goto timeout;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
}
+
tmp = ABORT;
msgptr = &tmp;
len = 1;
*/
-static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data) {
+static int NCR5380_transfer_dma(struct Scsi_Host *instance,
+ unsigned char *phase, int *count,
+ unsigned char **data)
+{
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
register int c = *count;
register unsigned char p = *phase;
register unsigned char *d = *data;
unsigned char saved_data = 0, overrun = 0, residue;
#endif
- struct NCR5380_hostdata *hostdata = shost_priv(instance);
-
if ((tmp = (NCR5380_read(STATUS_REG) & PHASE_MASK)) != p) {
*phase = tmp;
return -1;
* to recover from an unexpected bus free condition.
*/
-static void NCR5380_information_transfer(struct Scsi_Host *instance) {
+static void NCR5380_information_transfer(struct Scsi_Host *instance)
+{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char msgout = NOP;
int sink = 0;
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
- while (NCR5380_read(STATUS_REG) & SR_REQ);
+ while (NCR5380_read(STATUS_REG) & SR_REQ)
+ ;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
sink = 0;
continue;
}
+
switch (phase) {
case PHASE_DATAOUT:
#if (NDEBUG & NDEBUG_NO_DATAOUT)
cmd->SCp.this_residual,
cmd->SCp.buffers_residual);
}
+
/*
* The preferred transfer method is going to be
* PSEUDO-DMA for systems that are strictly PIO,
if (transfersize) {
len = transfersize;
- if (NCR5380_transfer_dma(instance, &phase, &len, (unsigned char **) &cmd->SCp.ptr)) {
+ if (NCR5380_transfer_dma(instance, &phase,
+ &len, (unsigned char **)&cmd->SCp.ptr)) {
/*
- * If the watchdog timer fires, all future accesses to this
- * device will use the polled-IO.
+ * If the watchdog timer fires, all future
+ * accesses to this device will use the
+ * polled-IO.
*/
scmd_printk(KERN_INFO, cmd,
- "switching to slow handshake\n");
+ "switching to slow handshake\n");
cmd->device->borken = 1;
sink = 1;
do_abort(instance);
break;
}
break;
- case DISCONNECT:{
- /* Accept message by clearing ACK */
- NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- hostdata->connected = NULL;
- list_add(&ncmd->list, &hostdata->disconnected);
- dsprintk(NDEBUG_INFORMATION | NDEBUG_QUEUES,
- instance, "connected command %p for target %d lun %llu moved to disconnected queue\n",
- cmd, scmd_id(cmd), cmd->device->lun);
+ case DISCONNECT:
+ /* Accept message by clearing ACK */
+ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
+ hostdata->connected = NULL;
+ list_add(&ncmd->list, &hostdata->disconnected);
+ dsprintk(NDEBUG_INFORMATION | NDEBUG_QUEUES,
+ instance, "connected command %p for target %d lun %llu moved to disconnected queue\n",
+ cmd, scmd_id(cmd), cmd->device->lun);
- /*
- * Restore phase bits to 0 so an interrupted selection,
- * arbitration can resume.
- */
- NCR5380_write(TARGET_COMMAND_REG, 0);
+ /*
+ * Restore phase bits to 0 so an interrupted selection,
+ * arbitration can resume.
+ */
+ NCR5380_write(TARGET_COMMAND_REG, 0);
- /* Enable reselect interrupts */
- NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
- return;
- }
+ /* Enable reselect interrupts */
+ NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
+ return;
/*
* The SCSI data pointer is *IMPLICITLY* saved on a disconnect
* operation, in violation of the SCSI spec so we can safely
printk("\n");
} else if (tmp != EXTENDED_MESSAGE)
scmd_printk(KERN_INFO, cmd,
- "rejecting unknown message %02x\n",tmp);
+ "rejecting unknown message %02x\n",
+ tmp);
else
scmd_printk(KERN_INFO, cmd,
- "rejecting unknown extended message code %02x, length %d\n", extended_msg[1], extended_msg[0]);
+ "rejecting unknown extended message code %02x, length %d\n",
+ extended_msg[1], extended_msg[0]);
msgout = MESSAGE_REJECT;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
break;
- } /* switch (tmp) */
+ } /* switch (tmp) */
break;
case PHASE_MSGOUT:
len = 1;
default:
shost_printk(KERN_ERR, instance, "unknown phase\n");
NCR5380_dprint(NDEBUG_ANY, instance);
- } /* switch(phase) */
+ } /* switch(phase) */
} else {
spin_unlock_irq(&hostdata->lock);
NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
* Inputs : instance - this instance of the NCR5380.
*/
-static void NCR5380_reselect(struct Scsi_Host *instance) {
+static void NCR5380_reselect(struct Scsi_Host *instance)
+{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char target_mask;
unsigned char lun, phase;
shost_printk(KERN_ERR, instance, "target bitmask 0x%02x lun %d not in disconnected queue.\n",
target_mask, lun);
/*
- * Since we have an established nexus that we can't do anything with,
- * we must abort it.
+ * Since we have an established nexus that we can't do anything
+ * with, we must abort it.
*/
do_abort(instance);
return;
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