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ncr5380: Merge changes from atari_NCR5380.c 

In the past, NCR5380.c was overlooked by those working on atari_NCR5380.c
and this caused needless divergence. All of the changes in this patch were
taken from atari_NCR5380.c.

This removes some unimportant discrepancies between the two core driver
forks so that 'diff' can be used to reveal the important ones, to
facilitate reunification.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Finn Thain 2016-01-03 16:06:11 +11:00 committed by Martin K. Petersen
parent 594d4ba36c
commit 0d2cf867e4
1 changed files with 87 additions and 68 deletions
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155
drivers/scsi/NCR5380.c
View File

@ -174,7 +174,7 @@ static int do_abort(struct Scsi_Host *);
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.
@ -264,19 +264,6 @@ static inline int NCR5380_poll_politely(struct Scsi_Host *instance,
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;
@ -311,6 +298,7 @@ mrs[] = {
{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"},
@ -318,8 +306,8 @@ mrs[] = {
};
/**
* 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
*/
@ -353,9 +341,21 @@ static void NCR5380_print(struct Scsi_Host *instance)
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
@ -370,7 +370,9 @@ static void NCR5380_print_phase(struct Scsi_Host *instance)
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);
}
}
@ -511,7 +513,7 @@ static int __maybe_unused NCR5380_write_info(struct Scsi_Host *instance,
}
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);
@ -522,7 +524,7 @@ static int __maybe_unused NCR5380_show_info(struct seq_file *m,
#endif
/**
* NCR5380_init - initialise an NCR5380
* NCR5380_init - initialise an NCR5380
* @instance: adapter to configure
* @flags: control flags
*
@ -530,7 +532,7 @@ static int __maybe_unused NCR5380_show_info(struct seq_file *m,
* 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
*/
@ -541,10 +543,9 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags)
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;
@ -569,8 +570,6 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags)
if (!hostdata->work_q)
return -ENOMEM;
hostdata->host = instance;
prepare_info(instance);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
@ -648,8 +647,10 @@ static int NCR5380_maybe_reset_bus(struct Scsi_Host *instance)
}
/**
* 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)
@ -714,7 +715,7 @@ static int NCR5380_queue_command(struct Scsi_Host *instance,
cmd->scsi_done(cmd);
return 0;
}
#endif /* (NDEBUG & NDEBUG_NO_WRITE) */
#endif /* (NDEBUG & NDEBUG_NO_WRITE) */
cmd->result = 0;
@ -801,7 +802,7 @@ static void requeue_cmd(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
}
/**
* 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
@ -1067,7 +1068,9 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
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);
@ -1133,7 +1136,7 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
* 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));
@ -1270,7 +1273,7 @@ out:
* 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.
@ -1284,7 +1287,10 @@ out:
* 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;
@ -1295,7 +1301,7 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
* 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 {
/*
@ -1314,6 +1320,7 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
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);
@ -1451,12 +1458,14 @@ static int do_abort(struct Scsi_Host *instance)
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;
@ -1495,7 +1504,11 @@ timeout:
*/
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;
@ -1506,8 +1519,6 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
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;
@ -1737,7 +1748,8 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
* 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;
@ -1764,11 +1776,13 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
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)
@ -1794,6 +1808,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
cmd->SCp.this_residual,
cmd->SCp.buffers_residual);
}
/*
* The preferred transfer method is going to be
* PSEUDO-DMA for systems that are strictly PIO,
@ -1812,13 +1827,15 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
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);
@ -1894,25 +1911,24 @@ static void NCR5380_information_transfer(struct Scsi_Host *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
@ -1994,15 +2010,17 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
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;
@ -2037,7 +2055,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
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);
@ -2056,7 +2074,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
* 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;
@ -2153,8 +2172,8 @@ static void NCR5380_reselect(struct Scsi_Host *instance) {
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;