diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c
index a4defd1977c957b0bc8bd204e2306f125b750399..5209f346ae80e3435779ba666b1b4867fb4673b0 100644
--- a/drivers/scsi/NCR5380.c
+++ b/drivers/scsi/NCR5380.c
@@ -612,6 +612,7 @@ static int __maybe_unused NCR5380_show_info(struct seq_file *m,
{
struct NCR5380_hostdata *hostdata;
struct scsi_cmnd *ptr;
+ unsigned long flags;
hostdata = (struct NCR5380_hostdata *) instance->hostdata;
@@ -619,7 +620,7 @@ static int __maybe_unused NCR5380_show_info(struct seq_file *m,
seq_printf(m, "Highwater I/O busy spin counts: write %d, read %d\n",
hostdata->spin_max_w, hostdata->spin_max_r);
#endif
- spin_lock_irq(instance->host_lock);
+ spin_lock_irqsave(&hostdata->lock, flags);
if (!hostdata->connected)
seq_printf(m, "scsi%d: no currently connected command\n", instance->host_no);
else
@@ -631,7 +632,7 @@ static int __maybe_unused NCR5380_show_info(struct seq_file *m,
seq_printf(m, "scsi%d: disconnected_queue\n", instance->host_no);
for (ptr = (struct scsi_cmnd *) hostdata->disconnected_queue; ptr; ptr = (struct scsi_cmnd *) ptr->host_scribble)
lprint_Scsi_Cmnd(ptr, m);
- spin_unlock_irq(instance->host_lock);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
return 0;
}
@@ -691,6 +692,7 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags)
#ifdef REAL_DMA
hostdata->dmalen = 0;
#endif
+ spin_lock_init(&hostdata->lock);
hostdata->connected = NULL;
hostdata->issue_queue = NULL;
hostdata->disconnected_queue = NULL;
@@ -830,7 +832,7 @@ static int NCR5380_queue_command(struct Scsi_Host *instance,
cmd->host_scribble = NULL;
cmd->result = 0;
- spin_lock_irqsave(instance->host_lock, flags);
+ spin_lock_irqsave(&hostdata->lock, flags);
/*
* Insert the cmd into the issue queue. Note that REQUEST SENSE
@@ -848,7 +850,7 @@ static int NCR5380_queue_command(struct Scsi_Host *instance,
LIST(cmd, tmp);
tmp->host_scribble = (unsigned char *) cmd;
}
- spin_unlock_irqrestore(instance->host_lock, flags);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
dprintk(NDEBUG_QUEUES, "scsi%d : command added to %s of queue\n", instance->host_no, (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail");
@@ -877,10 +879,10 @@ static void NCR5380_main(struct work_struct *work)
struct scsi_cmnd *tmp, *prev;
int done;
- spin_lock_irq(instance->host_lock);
+ spin_lock_irq(&hostdata->lock);
do {
- /* Lock held here */
done = 1;
+
if (!hostdata->connected) {
dprintk(NDEBUG_MAIN, "scsi%d : not connected\n", instance->host_no);
/*
@@ -930,11 +932,10 @@ static void NCR5380_main(struct work_struct *work)
}
if (hostdata->connected)
break;
- /* lock held here still */
} /* if target/lun is not busy */
} /* for */
- /* exited locked */
} /* if (!hostdata->connected) */
+
if (hostdata->connected
#ifdef REAL_DMA
&& !hostdata->dmalen
@@ -946,8 +947,7 @@ static void NCR5380_main(struct work_struct *work)
done = 0;
}
} while (!done);
-
- spin_unlock_irq(instance->host_lock);
+ spin_unlock_irq(&hostdata->lock);
}
#ifndef DONT_USE_INTR
@@ -994,7 +994,7 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id)
unsigned char basr;
unsigned long flags;
- spin_lock_irqsave(instance->host_lock, flags);
+ spin_lock_irqsave(&hostdata->lock, flags);
basr = NCR5380_read(BUS_AND_STATUS_REG);
if (basr & BASR_IRQ) {
@@ -1058,7 +1058,7 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id)
shost_printk(KERN_NOTICE, instance, "interrupt without IRQ bit\n");
}
- spin_unlock_irqrestore(instance->host_lock, flags);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
return IRQ_RETVAL(handled);
}
@@ -1125,11 +1125,11 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
* Bus Free Delay, arbitration will begin.
*/
- spin_unlock_irq(instance->host_lock);
+ spin_unlock_irq(&hostdata->lock);
err = NCR5380_poll_politely2(instance, MODE_REG, MR_ARBITRATE, 0,
INITIATOR_COMMAND_REG, ICR_ARBITRATION_PROGRESS,
ICR_ARBITRATION_PROGRESS, HZ);
- spin_lock_irq(instance->host_lock);
+ spin_lock_irq(&hostdata->lock);
if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE)) {
/* Reselection interrupt */
return -1;
@@ -1140,6 +1140,7 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
"select: arbitration timeout\n");
return -1;
}
+ spin_unlock_irq(&hostdata->lock);
/* The SCSI-2 arbitration delay is 2.4 us */
udelay(3);
@@ -1148,6 +1149,7 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
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);
dprintk(NDEBUG_ARBITRATION, "scsi%d : lost arbitration, deasserting MR_ARBITRATE\n", instance->host_no);
+ spin_lock_irq(&hostdata->lock);
return -1;
}
@@ -1168,6 +1170,8 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
else
udelay(2);
+ spin_lock_irq(&hostdata->lock);
+
/* NCR5380_reselect() clears MODE_REG after a reselection interrupt */
if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE))
return -1;
@@ -1196,6 +1200,8 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
*/
NCR5380_write(SELECT_ENABLE_REG, 0);
+ spin_unlock_irq(&hostdata->lock);
+
/*
* The initiator shall then wait at least two deskew delays and release
* the BSY signal.
@@ -1235,6 +1241,7 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
msecs_to_jiffies(250));
if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) {
+ spin_lock_irq(&hostdata->lock);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_reselect(instance);
if (!hostdata->connected)
@@ -1244,6 +1251,7 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
}
if (err < 0) {
+ spin_lock_irq(&hostdata->lock);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
cmd->result = DID_BAD_TARGET << 16;
cmd->scsi_done(cmd);
@@ -1280,9 +1288,8 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
/* Wait for start of REQ/ACK handshake */
- spin_unlock_irq(instance->host_lock);
err = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
- spin_lock_irq(instance->host_lock);
+ spin_lock_irq(&hostdata->lock);
if (err < 0) {
shost_printk(KERN_ERR, instance, "select: REQ timeout\n");
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
@@ -1302,6 +1309,7 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
NCR5380_transfer_pio(instance, &phase, &len, &data);
dprintk(NDEBUG_SELECTION, "scsi%d : nexus established.\n", instance->host_no);
/* XXX need to handle errors here */
+
hostdata->connected = cmd;
hostdata->busy[cmd->device->id] |= (1 << (cmd->device->lun & 0xFF));
@@ -1805,9 +1813,9 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
#endif
unsigned char *data;
unsigned char phase, tmp, extended_msg[10], old_phase = 0xff;
- struct scsi_cmnd *cmd = (struct scsi_cmnd *) hostdata->connected;
+ struct scsi_cmnd *cmd;
- while (1) {
+ while ((cmd = hostdata->connected)) {
tmp = NCR5380_read(STATUS_REG);
/* We only have a valid SCSI phase when REQ is asserted */
if (tmp & SR_REQ) {
@@ -1883,8 +1891,12 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
cmd->SCp.this_residual -= transfersize - len;
} else
#endif /* defined(PSEUDO_DMA) || defined(REAL_DMA_POLL) */
+ {
+ spin_unlock_irq(&hostdata->lock);
NCR5380_transfer_pio(instance, &phase, (int *) &cmd->SCp.this_residual, (unsigned char **)
&cmd->SCp.ptr);
+ spin_lock_irq(&hostdata->lock);
+ }
break;
case PHASE_MSGIN:
len = 1;
@@ -2016,6 +2028,9 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
extended_msg[0] = EXTENDED_MESSAGE;
/* Accept first byte by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
+
+ spin_unlock_irq(&hostdata->lock);
+
dprintk(NDEBUG_EXTENDED, "scsi%d : receiving extended message\n", instance->host_no);
len = 2;
@@ -2050,6 +2065,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
printk("scsi%d: extended message code %02x length %d is too long\n", instance->host_no, extended_msg[2], extended_msg[1]);
tmp = 0;
}
+
+ spin_lock_irq(&hostdata->lock);
+ if (!hostdata->connected)
+ return;
+
/* Fall through to reject message */
/*
@@ -2109,11 +2129,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
NCR5380_dprint(NDEBUG_ANY, instance);
} /* switch(phase) */
} else {
- spin_unlock_irq(instance->host_lock);
+ spin_unlock_irq(&hostdata->lock);
NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
- spin_lock_irq(instance->host_lock);
+ spin_lock_irq(&hostdata->lock);
}
- } /* while (1) */
+ }
}
/*
@@ -2309,10 +2329,12 @@ static int NCR5380_abort(struct scsi_cmnd *cmd)
struct Scsi_Host *instance = cmd->device->host;
struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
struct scsi_cmnd *tmp, **prev;
+ unsigned long flags;
scmd_printk(KERN_WARNING, cmd, "aborting command\n");
- spin_lock_irq(instance->host_lock);
+ spin_lock_irqsave(&hostdata->lock, flags);
+
NCR5380_print_status(instance);
dprintk(NDEBUG_ABORT, "scsi%d : abort called\n", instance->host_no);
@@ -2359,7 +2381,7 @@ static int NCR5380_abort(struct scsi_cmnd *cmd)
REMOVE(5, *prev, tmp, tmp->host_scribble);
(*prev) = (struct scsi_cmnd *) tmp->host_scribble;
tmp->host_scribble = NULL;
- spin_unlock_irq(instance->host_lock);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
tmp->result = DID_ABORT << 16;
dprintk(NDEBUG_ABORT, "scsi%d : abort removed command from issue queue.\n", instance->host_no);
tmp->scsi_done(tmp);
@@ -2383,7 +2405,7 @@ static int NCR5380_abort(struct scsi_cmnd *cmd)
*/
if (hostdata->connected) {
- spin_unlock_irq(instance->host_lock);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
dprintk(NDEBUG_ABORT, "scsi%d : abort failed, command connected.\n", instance->host_no);
return FAILED;
}
@@ -2417,7 +2439,7 @@ static int NCR5380_abort(struct scsi_cmnd *cmd)
dprintk(NDEBUG_ABORT, "scsi%d : aborting disconnected command.\n", instance->host_no);
if (NCR5380_select(instance, cmd)) {
- spin_unlock_irq(instance->host_lock);
+ spin_unlock_irq(&hostdata->lock);
return FAILED;
}
dprintk(NDEBUG_ABORT, "scsi%d : nexus reestablished.\n", instance->host_no);
@@ -2429,7 +2451,7 @@ static int NCR5380_abort(struct scsi_cmnd *cmd)
REMOVE(5, *prev, tmp, tmp->host_scribble);
*prev = (struct scsi_cmnd *) tmp->host_scribble;
tmp->host_scribble = NULL;
- spin_unlock_irq(instance->host_lock);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
tmp->result = DID_ABORT << 16;
tmp->scsi_done(tmp);
return SUCCESS;
@@ -2444,7 +2466,7 @@ static int NCR5380_abort(struct scsi_cmnd *cmd)
* so we won't panic, but we will notify the user in case something really
* broke.
*/
- spin_unlock_irq(instance->host_lock);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
printk(KERN_WARNING "scsi%d : warning : SCSI command probably completed successfully\n"
" before abortion\n", instance->host_no);
return FAILED;
@@ -2461,8 +2483,10 @@ static int NCR5380_abort(struct scsi_cmnd *cmd)
static int NCR5380_bus_reset(struct scsi_cmnd *cmd)
{
struct Scsi_Host *instance = cmd->device->host;
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
+ unsigned long flags;
- spin_lock_irq(instance->host_lock);
+ spin_lock_irqsave(&hostdata->lock, flags);
#if (NDEBUG & NDEBUG_ANY)
scmd_printk(KERN_INFO, cmd, "performing bus reset\n");
@@ -2471,7 +2495,7 @@ static int NCR5380_bus_reset(struct scsi_cmnd *cmd)
do_reset(instance);
- spin_unlock_irq(instance->host_lock);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
return SUCCESS;
}
diff --git a/drivers/scsi/NCR5380.h b/drivers/scsi/NCR5380.h
index 96fced9e606428305860b9960ec73135a055ffdc..aab360810c43a4747050039e1d925392319e621f 100644
--- a/drivers/scsi/NCR5380.h
+++ b/drivers/scsi/NCR5380.h
@@ -256,6 +256,7 @@ struct NCR5380_hostdata {
volatile struct scsi_cmnd *connected; /* currently connected command */
volatile struct scsi_cmnd *issue_queue; /* waiting to be issued */
volatile struct scsi_cmnd *disconnected_queue; /* waiting for reconnect */
+ spinlock_t lock; /* protects this struct */
int flags;
struct scsi_eh_save ses;
char info[256];
diff --git a/drivers/scsi/atari_NCR5380.c b/drivers/scsi/atari_NCR5380.c
index 08e8ace2681bffe89831513107591e188d971e64..2dd65cdb0930db9a3c6a07e16839195da320b1fa 100644
--- a/drivers/scsi/atari_NCR5380.c
+++ b/drivers/scsi/atari_NCR5380.c
@@ -546,15 +546,13 @@ static struct {
static void NCR5380_print(struct Scsi_Host *instance)
{
unsigned char status, data, basr, mr, icr, i;
- unsigned long flags;
- local_irq_save(flags);
data = NCR5380_read(CURRENT_SCSI_DATA_REG);
status = NCR5380_read(STATUS_REG);
mr = NCR5380_read(MODE_REG);
icr = NCR5380_read(INITIATOR_COMMAND_REG);
basr = NCR5380_read(BUS_AND_STATUS_REG);
- local_irq_restore(flags);
+
printk("STATUS_REG: %02x ", status);
for (i = 0; signals[i].mask; ++i)
if (status & signals[i].mask)
@@ -684,14 +682,12 @@ static void __maybe_unused NCR5380_print_status(struct Scsi_Host *instance)
{
struct NCR5380_hostdata *hostdata;
struct scsi_cmnd *ptr;
- unsigned long flags;
NCR5380_dprint(NDEBUG_ANY, instance);
NCR5380_dprint_phase(NDEBUG_ANY, instance);
hostdata = (struct NCR5380_hostdata *)instance->hostdata;
- local_irq_save(flags);
if (!hostdata->connected)
printk("scsi%d: no currently connected command\n", HOSTNO);
else
@@ -704,8 +700,6 @@ static void __maybe_unused NCR5380_print_status(struct Scsi_Host *instance)
for (ptr = (struct scsi_cmnd *) hostdata->disconnected_queue; ptr;
ptr = NEXT(ptr))
lprint_Scsi_Cmnd(ptr);
-
- local_irq_restore(flags);
printk("\n");
}
@@ -732,7 +726,7 @@ static int __maybe_unused NCR5380_show_info(struct seq_file *m,
hostdata = (struct NCR5380_hostdata *)instance->hostdata;
- local_irq_save(flags);
+ spin_lock_irqsave(&hostdata->lock, flags);
if (!hostdata->connected)
seq_printf(m, "scsi%d: no currently connected command\n", HOSTNO);
else
@@ -746,7 +740,7 @@ static int __maybe_unused NCR5380_show_info(struct seq_file *m,
ptr = NEXT(ptr))
show_Scsi_Cmnd(ptr, m);
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
return 0;
}
@@ -784,6 +778,7 @@ static int __init NCR5380_init(struct Scsi_Host *instance, int flags)
#if defined (REAL_DMA)
hostdata->dma_len = 0;
#endif
+ spin_lock_init(&hostdata->lock);
hostdata->connected = NULL;
hostdata->issue_queue = NULL;
hostdata->disconnected_queue = NULL;
@@ -946,7 +941,7 @@ static int NCR5380_queue_command(struct Scsi_Host *instance,
if (!NCR5380_acquire_dma_irq(instance))
return SCSI_MLQUEUE_HOST_BUSY;
- local_irq_save(flags);
+ spin_lock_irqsave(&hostdata->lock, flags);
/*
* Insert the cmd into the issue queue. Note that REQUEST SENSE
@@ -966,7 +961,7 @@ static int NCR5380_queue_command(struct Scsi_Host *instance,
LIST(cmd, tmp);
SET_NEXT(tmp, cmd);
}
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
dprintk(NDEBUG_QUEUES, "scsi%d: command added to %s of queue\n", H_NO(cmd),
(cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail");
@@ -1006,7 +1001,6 @@ static void NCR5380_main(struct work_struct *work)
struct Scsi_Host *instance = hostdata->host;
struct scsi_cmnd *tmp, *prev;
int done;
- unsigned long flags;
/*
* ++roman: Just disabling the NCR interrupt isn't sufficient here,
@@ -1014,9 +1008,8 @@ static void NCR5380_main(struct work_struct *work)
* alter queues and touch the Falcon lock.
*/
- local_save_flags(flags);
+ spin_lock_irq(&hostdata->lock);
do {
- local_irq_disable(); /* Freeze request queues */
done = 1;
if (!hostdata->connected) {
@@ -1043,7 +1036,6 @@ static void NCR5380_main(struct work_struct *work)
tmp, scmd_id(tmp), hostdata->busy[scmd_id(tmp)],
lun);
/* When we find one, remove it from the issue queue. */
- /* ++guenther: possible race with Falcon locking */
if (
#ifdef SUPPORT_TAGS
!is_lun_busy( tmp, tmp->cmnd[0] != REQUEST_SENSE)
@@ -1051,8 +1043,6 @@ static void NCR5380_main(struct work_struct *work)
!(hostdata->busy[tmp->device->id] & (1 << lun))
#endif
) {
- /* ++guenther: just to be sure, this must be atomic */
- local_irq_disable();
if (prev) {
REMOVE(prev, NEXT(prev), tmp, NEXT(tmp));
SET_NEXT(prev, NEXT(tmp));
@@ -1063,9 +1053,6 @@ static void NCR5380_main(struct work_struct *work)
SET_NEXT(tmp, NULL);
hostdata->retain_dma_intr++;
- /* reenable interrupts after finding one */
- local_irq_restore(flags);
-
/*
* Attempt to establish an I_T_L nexus here.
* On success, instance->hostdata->connected is set.
@@ -1090,13 +1077,10 @@ static void NCR5380_main(struct work_struct *work)
#endif
if (!NCR5380_select(instance, tmp)) {
/* OK or bad target */
- local_irq_disable();
hostdata->retain_dma_intr--;
maybe_release_dma_irq(instance);
- local_irq_restore(flags);
} else {
/* Need to retry */
- local_irq_disable();
LIST(tmp, hostdata->issue_queue);
SET_NEXT(tmp, hostdata->issue_queue);
hostdata->issue_queue = tmp;
@@ -1104,7 +1088,6 @@ static void NCR5380_main(struct work_struct *work)
cmd_free_tag(tmp);
#endif
hostdata->retain_dma_intr--;
- local_irq_restore(flags);
done = 0;
dprintk(NDEBUG_MAIN, "scsi%d: main(): select() failed, "
"returned to issue_queue\n", HOSTNO);
@@ -1120,7 +1103,6 @@ static void NCR5380_main(struct work_struct *work)
&& !hostdata->dma_len
#endif
) {
- local_irq_restore(flags);
dprintk(NDEBUG_MAIN, "scsi%d: main: performing information transfer\n",
HOSTNO);
NCR5380_information_transfer(instance);
@@ -1128,7 +1110,7 @@ static void NCR5380_main(struct work_struct *work)
done = 0;
}
} while (!done);
- local_irq_restore(flags);
+ spin_unlock_irq(&hostdata->lock);
}
@@ -1257,6 +1239,9 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id)
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int handled = 0;
unsigned char basr;
+ unsigned long flags;
+
+ spin_lock_irqsave(&hostdata->lock, flags);
basr = NCR5380_read(BUS_AND_STATUS_REG);
if (basr & BASR_IRQ) {
@@ -1316,6 +1301,8 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id)
#endif
}
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+
return IRQ_RETVAL(handled);
}
@@ -1355,7 +1342,6 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
unsigned char *data;
int len;
int err;
- unsigned long flags;
NCR5380_dprint(NDEBUG_ARBITRATION, instance);
dprintk(NDEBUG_ARBITRATION, "scsi%d: starting arbitration, id = %d\n", HOSTNO,
@@ -1366,11 +1352,6 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
* data bus during SELECTION.
*/
- local_irq_save(flags);
- if (hostdata->connected) {
- local_irq_restore(flags);
- return -1;
- }
NCR5380_write(TARGET_COMMAND_REG, 0);
/*
@@ -1384,10 +1365,11 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
* Bus Free Delay, arbitration will begin.
*/
- local_irq_restore(flags);
+ spin_unlock_irq(&hostdata->lock);
err = NCR5380_poll_politely2(instance, MODE_REG, MR_ARBITRATE, 0,
INITIATOR_COMMAND_REG, ICR_ARBITRATION_PROGRESS,
ICR_ARBITRATION_PROGRESS, HZ);
+ spin_lock_irq(&hostdata->lock);
if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE)) {
/* Reselection interrupt */
return -1;
@@ -1398,6 +1380,7 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
"select: arbitration timeout\n");
return -1;
}
+ spin_unlock_irq(&hostdata->lock);
/* The SCSI-2 arbitration delay is 2.4 us */
udelay(3);
@@ -1405,11 +1388,11 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
/* 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) ||
- hostdata->connected) {
+ (NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) {
NCR5380_write(MODE_REG, MR_BASE);
dprintk(NDEBUG_ARBITRATION, "scsi%d: lost arbitration, deasserting MR_ARBITRATE\n",
HOSTNO);
+ spin_lock_irq(&hostdata->lock);
return -1;
}
@@ -1430,6 +1413,8 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
else
udelay(2);
+ spin_lock_irq(&hostdata->lock);
+
/* NCR5380_reselect() clears MODE_REG after a reselection interrupt */
if (!(NCR5380_read(MODE_REG) & MR_ARBITRATE))
return -1;
@@ -1457,14 +1442,10 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
* Reselect interrupts must be turned off prior to the dropping of BSY,
* otherwise we will trigger an interrupt.
*/
-
- if (hostdata->connected) {
- NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- return -1;
- }
-
NCR5380_write(SELECT_ENABLE_REG, 0);
+ spin_unlock_irq(&hostdata->lock);
+
/*
* The initiator shall then wait at least two deskew delays and release
* the BSY signal.
@@ -1505,6 +1486,7 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
msecs_to_jiffies(250));
if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) {
+ spin_lock_irq(&hostdata->lock);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
NCR5380_reselect(instance);
if (!hostdata->connected)
@@ -1515,6 +1497,7 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
}
if (err < 0) {
+ spin_lock_irq(&hostdata->lock);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
cmd->result = DID_BAD_TARGET << 16;
#ifdef SUPPORT_TAGS
@@ -1554,6 +1537,7 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
/* Wait for start of REQ/ACK handshake */
err = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
+ spin_lock_irq(&hostdata->lock);
if (err < 0) {
shost_printk(KERN_ERR, instance, "select: REQ timeout\n");
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
@@ -1583,6 +1567,7 @@ static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
NCR5380_transfer_pio(instance, &phase, &len, &data);
dprintk(NDEBUG_SELECTION, "scsi%d: nexus established.\n", HOSTNO);
/* XXX need to handle errors here */
+
hostdata->connected = cmd;
#ifndef SUPPORT_TAGS
hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun);
@@ -1849,7 +1834,6 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
SETUP_HOSTDATA(instance);
register int c = *count;
register unsigned char p = *phase;
- unsigned long flags;
#if defined(CONFIG_SUN3)
/* sanity check */
@@ -1865,7 +1849,6 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
c, (p & SR_IO) ? "to" : "from", *data);
/* netbsd turns off ints here, why not be safe and do it too */
- local_irq_save(flags);
/* send start chain */
sun3scsi_dma_start(c, *data);
@@ -1885,8 +1868,6 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
dregs->csr |= CSR_DMA_ENABLE;
#endif
- local_irq_restore(flags);
-
sun3_dma_active = 1;
#else /* !defined(CONFIG_SUN3) */
@@ -1913,11 +1894,9 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
/* On the Medusa, it is a must to initialize the DMA before
* starting the NCR. This is also the cleaner way for the TT.
*/
- local_irq_save(flags);
hostdata->dma_len = (p & SR_IO) ?
NCR5380_dma_read_setup(instance, d, c) :
NCR5380_dma_write_setup(instance, d, c);
- local_irq_restore(flags);
}
if (p & SR_IO)
@@ -1931,11 +1910,9 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
/* On the Falcon, the DMA setup must be done after the last */
/* NCR access, else the DMA setup gets trashed!
*/
- local_irq_save(flags);
hostdata->dma_len = (p & SR_IO) ?
NCR5380_dma_read_setup(instance, d, c) :
NCR5380_dma_write_setup(instance, d, c);
- local_irq_restore(flags);
}
#endif /* !defined(CONFIG_SUN3) */
@@ -1963,7 +1940,6 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
static void NCR5380_information_transfer(struct Scsi_Host *instance)
{
SETUP_HOSTDATA(instance);
- unsigned long flags;
unsigned char msgout = NOP;
int sink = 0;
int len;
@@ -1972,13 +1948,13 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
#endif
unsigned char *data;
unsigned char phase, tmp, extended_msg[10], old_phase = 0xff;
- struct scsi_cmnd *cmd = (struct scsi_cmnd *) hostdata->connected;
+ struct scsi_cmnd *cmd;
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_INTR;
#endif
- while (1) {
+ while ((cmd = hostdata->connected)) {
tmp = NCR5380_read(STATUS_REG);
/* We only have a valid SCSI phase when REQ is asserted */
if (tmp & SR_REQ) {
@@ -2112,9 +2088,13 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
}
} else
#endif /* defined(REAL_DMA) */
+ {
+ spin_unlock_irq(&hostdata->lock);
NCR5380_transfer_pio(instance, &phase,
(int *)&cmd->SCp.this_residual,
(unsigned char **)&cmd->SCp.ptr);
+ spin_lock_irq(&hostdata->lock);
+ }
#if defined(CONFIG_SUN3) && defined(REAL_DMA)
/* if we had intended to dma that command clear it */
if (sun3_dma_setup_done == cmd)
@@ -2124,7 +2104,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
case PHASE_MSGIN:
len = 1;
data = &tmp;
- NCR5380_write(SELECT_ENABLE_REG, 0); /* disable reselects */
NCR5380_transfer_pio(instance, &phase, &len, &data);
cmd->SCp.Message = tmp;
@@ -2136,7 +2115,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
dprintk(NDEBUG_QUEUES, "scsi%d: command for target %d, lun %llu "
"completed\n", HOSTNO, cmd->device->id, cmd->device->lun);
- local_irq_save(flags);
hostdata->connected = NULL;
#ifdef SUPPORT_TAGS
cmd_free_tag(cmd);
@@ -2152,8 +2130,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
#else
hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
#endif
- /* Enable reselect interrupts */
- NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
/*
* I'm not sure what the correct thing to do here is :
@@ -2211,13 +2187,10 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
* disconnected queue.
*/
maybe_release_dma_irq(instance);
- local_irq_restore(flags);
return;
case MESSAGE_REJECT:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- /* Enable reselect interrupts */
- NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
switch (hostdata->last_message) {
case HEAD_OF_QUEUE_TAG:
case ORDERED_QUEUE_TAG:
@@ -2241,12 +2214,10 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
case DISCONNECT:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- local_irq_save(flags);
LIST(cmd,hostdata->disconnected_queue);
SET_NEXT(cmd, hostdata->disconnected_queue);
hostdata->connected = NULL;
hostdata->disconnected_queue = cmd;
- local_irq_restore(flags);
dprintk(NDEBUG_QUEUES, "scsi%d: command for target %d lun %llu was "
"moved from connected to the "
"disconnected_queue\n", HOSTNO,
@@ -2277,8 +2248,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
case RESTORE_POINTERS:
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
- /* Enable reselect interrupts */
- NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
break;
case EXTENDED_MESSAGE:
/*
@@ -2297,6 +2266,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
/* Accept first byte by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
+ spin_unlock_irq(&hostdata->lock);
+
dprintk(NDEBUG_EXTENDED, "scsi%d: receiving extended message\n", HOSTNO);
len = 2;
@@ -2335,6 +2306,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
HOSTNO, extended_msg[2], extended_msg[1]);
tmp = 0;
}
+
+ spin_lock_irq(&hostdata->lock);
+ if (!hostdata->connected)
+ return;
+
/* Fall through to reject message */
/*
@@ -2367,7 +2343,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
hostdata->last_message = msgout;
NCR5380_transfer_pio(instance, &phase, &len, &data);
if (msgout == ABORT) {
- local_irq_save(flags);
#ifdef SUPPORT_TAGS
cmd_free_tag(cmd);
#else
@@ -2376,7 +2351,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
hostdata->connected = NULL;
cmd->result = DID_ERROR << 16;
maybe_release_dma_irq(instance);
- local_irq_restore(flags);
cmd->scsi_done(cmd);
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return;
@@ -2404,9 +2378,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
NCR5380_dprint(NDEBUG_ANY, instance);
} /* switch(phase) */
} else {
+ spin_unlock_irq(&hostdata->lock);
NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
+ spin_lock_irq(&hostdata->lock);
}
- } /* while (1) */
+ }
}
/*
@@ -2639,9 +2615,9 @@ int NCR5380_abort(struct scsi_cmnd *cmd)
scmd_printk(KERN_NOTICE, cmd, "aborting command\n");
- NCR5380_print_status(instance);
+ spin_lock_irqsave(&hostdata->lock, flags);
- local_irq_save(flags);
+ NCR5380_print_status(instance);
dprintk(NDEBUG_ABORT, "scsi%d: abort called basr 0x%02x, sr 0x%02x\n", HOSTNO,
NCR5380_read(BUS_AND_STATUS_REG),
@@ -2683,11 +2659,11 @@ int NCR5380_abort(struct scsi_cmnd *cmd)
hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
#endif
maybe_release_dma_irq(instance);
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
cmd->scsi_done(cmd);
return SUCCESS;
} else {
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
printk("scsi%d: abort of connected command failed!\n", HOSTNO);
return FAILED;
}
@@ -2707,7 +2683,7 @@ int NCR5380_abort(struct scsi_cmnd *cmd)
SET_NEXT(tmp, NULL);
tmp->result = DID_ABORT << 16;
maybe_release_dma_irq(instance);
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
dprintk(NDEBUG_ABORT, "scsi%d: abort removed command from issue queue.\n",
HOSTNO);
/* Tagged queuing note: no tag to free here, hasn't been assigned
@@ -2729,7 +2705,7 @@ int NCR5380_abort(struct scsi_cmnd *cmd)
*/
if (hostdata->connected) {
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
dprintk(NDEBUG_ABORT, "scsi%d: abort failed, command connected.\n", HOSTNO);
return FAILED;
}
@@ -2762,17 +2738,16 @@ int NCR5380_abort(struct scsi_cmnd *cmd)
for (tmp = (struct scsi_cmnd *) hostdata->disconnected_queue; tmp;
tmp = NEXT(tmp)) {
if (cmd == tmp) {
- local_irq_restore(flags);
dprintk(NDEBUG_ABORT, "scsi%d: aborting disconnected command.\n", HOSTNO);
- if (NCR5380_select(instance, cmd))
+ if (NCR5380_select(instance, cmd)) {
+ spin_unlock_irq(&hostdata->lock);
return FAILED;
-
+ }
dprintk(NDEBUG_ABORT, "scsi%d: nexus reestablished.\n", HOSTNO);
do_abort(instance);
- local_irq_save(flags);
for (prev = (struct scsi_cmnd **)&(hostdata->disconnected_queue),
tmp = (struct scsi_cmnd *)hostdata->disconnected_queue;
tmp; prev = NEXTADDR(tmp), tmp = NEXT(tmp)) {
@@ -2791,7 +2766,7 @@ int NCR5380_abort(struct scsi_cmnd *cmd)
hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
#endif
maybe_release_dma_irq(instance);
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
tmp->scsi_done(tmp);
return SUCCESS;
}
@@ -2804,7 +2779,7 @@ int NCR5380_abort(struct scsi_cmnd *cmd)
* released after the abort, in case it is kept due to some bug.
*/
maybe_release_dma_irq(instance);
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
/*
* Case 5 : If we reached this point, the command was not found in any of
@@ -2836,7 +2811,7 @@ static int NCR5380_bus_reset(struct scsi_cmnd *cmd)
int i;
unsigned long flags;
- local_irq_save(flags);
+ spin_lock_irqsave(&hostdata->lock, flags);
#if (NDEBUG & NDEBUG_ANY)
scmd_printk(KERN_INFO, cmd, "performing bus reset\n");
@@ -2876,7 +2851,7 @@ static int NCR5380_bus_reset(struct scsi_cmnd *cmd)
#endif
maybe_release_dma_irq(instance);
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
return SUCCESS;
}