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authorFinn Thain <fthain@telegraphics.com.au>2014-11-12 16:12:14 +1100
committerChristoph Hellwig <hch@lst.de>2014-11-20 09:11:16 +0100
commitef1081cbf05b22d3d0e05b267a5559a8cd8e8d4a (patch)
tree327b642eab6b4d83d5cc268e78a1fb62bfa097ff /drivers/scsi/atari_NCR5380.c
parentf527590278f1b823ba979a234241d09ed2c436b4 (diff)
atari_NCR5380: Refactor Falcon special cases
Make the atari_NCR5380.c core driver usable by sun3_scsi, mac_scsi and others by moving some of the Falcon-specific code out of the core driver: !IS_A_TT, atari_read_overruns and falcon_dont_release. Replace these with hostdata variables and flags. FLAG_CHECK_LAST_BYTE_SENT is unused in atari_NCR5380.c so don't set it. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Hannes Reinecke <hare@suse.de> Tested-by: Michael Schmitz <schmitzmic@gmail.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/atari_NCR5380.c')
-rw-r--r--drivers/scsi/atari_NCR5380.c30
1 files changed, 15 insertions, 15 deletions
diff --git a/drivers/scsi/atari_NCR5380.c b/drivers/scsi/atari_NCR5380.c
index 75d34031c280..371ca14f08ea 100644
--- a/drivers/scsi/atari_NCR5380.c
+++ b/drivers/scsi/atari_NCR5380.c
@@ -839,7 +839,7 @@ static int __init NCR5380_init(struct Scsi_Host *instance, int flags)
hostdata->connected = NULL;
hostdata->issue_queue = NULL;
hostdata->disconnected_queue = NULL;
- hostdata->flags = FLAG_CHECK_LAST_BYTE_SENT;
+ hostdata->flags = flags;
if (!the_template) {
the_template = instance->hostt;
@@ -1054,7 +1054,7 @@ static void NCR5380_main(struct work_struct *work)
hostdata->issue_queue = NEXT(tmp);
}
SET_NEXT(tmp, NULL);
- falcon_dont_release++;
+ hostdata->retain_dma_intr++;
/* reenable interrupts after finding one */
local_irq_restore(flags);
@@ -1082,7 +1082,7 @@ static void NCR5380_main(struct work_struct *work)
cmd_get_tag(tmp, tmp->cmnd[0] != REQUEST_SENSE);
#endif
if (!NCR5380_select(instance, tmp)) {
- falcon_dont_release--;
+ hostdata->retain_dma_intr--;
/* release if target did not response! */
falcon_release_lock_if_possible(hostdata);
break;
@@ -1094,7 +1094,7 @@ static void NCR5380_main(struct work_struct *work)
#ifdef SUPPORT_TAGS
cmd_free_tag(tmp);
#endif
- falcon_dont_release--;
+ hostdata->retain_dma_intr--;
local_irq_restore(flags);
dprintk(NDEBUG_MAIN, "scsi%d: main(): select() failed, "
"returned to issue_queue\n", HOSTNO);
@@ -1151,7 +1151,7 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance)
return;
}
- if (atari_read_overruns) {
+ if (hostdata->read_overruns) {
p = hostdata->connected->SCp.phase;
if (p & SR_IO) {
udelay(10);
@@ -1181,9 +1181,9 @@ static void NCR5380_dma_complete(struct Scsi_Host *instance)
*data += transfered;
*count -= transfered;
- if (atari_read_overruns) {
+ if (hostdata->read_overruns) {
if ((NCR5380_read(STATUS_REG) & PHASE_MASK) == p && (p & SR_IO)) {
- cnt = toPIO = atari_read_overruns;
+ cnt = toPIO = hostdata->read_overruns;
if (overrun) {
dprintk(NDEBUG_DMA, "Got an input overrun, using saved byte\n");
*(*data)++ = saved_data;
@@ -1838,8 +1838,8 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
return -1;
}
- if (atari_read_overruns && (p & SR_IO))
- c -= atari_read_overruns;
+ if (hostdata->read_overruns && (p & SR_IO))
+ c -= hostdata->read_overruns;
dprintk(NDEBUG_DMA, "scsi%d: initializing DMA for %s, %d bytes %s %p\n",
HOSTNO, (p & SR_IO) ? "reading" : "writing",
@@ -1851,7 +1851,7 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_ENABLE_EOP_INTR | MR_MONITOR_BSY);
#endif /* def REAL_DMA */
- if (IS_A_TT()) {
+ if (!(hostdata->flags & FLAG_LATE_DMA_SETUP)) {
/* On the Medusa, it is a must to initialize the DMA before
* starting the NCR. This is also the cleaner way for the TT.
*/
@@ -1869,7 +1869,7 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance,
NCR5380_write(START_DMA_SEND_REG, 0);
}
- if (!IS_A_TT()) {
+ if (hostdata->flags & FLAG_LATE_DMA_SETUP) {
/* On the Falcon, the DMA setup must be done after the last */
/* NCR access, else the DMA setup gets trashed!
*/
@@ -2084,7 +2084,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
/* Accept message by clearing ACK */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
/* ++guenther: possible race with Falcon locking */
- falcon_dont_release++;
+ hostdata->retain_dma_intr++;
hostdata->connected = NULL;
dprintk(NDEBUG_QUEUES, "scsi%d: command for target %d, lun %llu "
"completed\n", HOSTNO, cmd->device->id, cmd->device->lun);
@@ -2167,7 +2167,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected)
barrier();
- falcon_dont_release--;
+ hostdata->retain_dma_intr--;
/* ++roman: For Falcon SCSI, release the lock on the
* ST-DMA here if no other commands are waiting on the
* disconnected queue.
@@ -2474,7 +2474,7 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
#endif
) {
/* ++guenther: prevent race with falcon_release_lock */
- falcon_dont_release++;
+ hostdata->retain_dma_intr++;
if (prev) {
REMOVE(prev, NEXT(prev), tmp, NEXT(tmp));
SET_NEXT(prev, NEXT(tmp));
@@ -2512,7 +2512,7 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
hostdata->connected = tmp;
dprintk(NDEBUG_RESELECTION, "scsi%d: nexus established, target = %d, lun = %llu, tag = %d\n",
HOSTNO, tmp->device->id, tmp->device->lun, tmp->tag);
- falcon_dont_release--;
+ hostdata->retain_dma_intr--;
}