scsi: ncr5380: Pass hostdata pointer to register polling routines
Pass a NCR5380_hostdata struct pointer to the board-specific routines
instead of a Scsi_Host struct pointer. This reduces pointer chasing in
the PIO and PDMA fast paths. The old way was a mistake because it is
slow and the board-specific code is not concerned with the mid-layer.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/mac_scsi.c b/drivers/scsi/mac_scsi.c
index 9ac3822..07f956c 100644
--- a/drivers/scsi/mac_scsi.c
+++ b/drivers/scsi/mac_scsi.c
@@ -161,7 +161,7 @@ static int macscsi_pread(struct Scsi_Host *instance,
int n = len;
int transferred;
- while (!NCR5380_poll_politely(instance, BUS_AND_STATUS_REG,
+ while (!NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG,
BASR_DRQ | BASR_PHASE_MATCH,
BASR_DRQ | BASR_PHASE_MATCH, HZ / 64)) {
CP_IO_TO_MEM(s, d, n);
@@ -174,7 +174,7 @@ static int macscsi_pread(struct Scsi_Host *instance,
return 0;
/* Target changed phase early? */
- if (NCR5380_poll_politely2(instance, STATUS_REG, SR_REQ, SR_REQ,
+ if (NCR5380_poll_politely2(hostdata, STATUS_REG, SR_REQ, SR_REQ,
BUS_AND_STATUS_REG, BASR_ACK, BASR_ACK, HZ / 64) < 0)
scmd_printk(KERN_ERR, hostdata->connected,
"%s: !REQ and !ACK\n", __func__);
@@ -264,7 +264,7 @@ static int macscsi_pwrite(struct Scsi_Host *instance,
int n = len;
int transferred;
- while (!NCR5380_poll_politely(instance, BUS_AND_STATUS_REG,
+ while (!NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG,
BASR_DRQ | BASR_PHASE_MATCH,
BASR_DRQ | BASR_PHASE_MATCH, HZ / 64)) {
CP_MEM_TO_IO(s, d, n);
@@ -273,7 +273,7 @@ static int macscsi_pwrite(struct Scsi_Host *instance,
hostdata->pdma_residual = len - transferred;
/* Target changed phase early? */
- if (NCR5380_poll_politely2(instance, STATUS_REG, SR_REQ, SR_REQ,
+ if (NCR5380_poll_politely2(hostdata, STATUS_REG, SR_REQ, SR_REQ,
BUS_AND_STATUS_REG, BASR_ACK, BASR_ACK, HZ / 64) < 0)
scmd_printk(KERN_ERR, hostdata->connected,
"%s: !REQ and !ACK\n", __func__);
@@ -282,7 +282,7 @@ static int macscsi_pwrite(struct Scsi_Host *instance,
/* No bus error. */
if (n == 0) {
- if (NCR5380_poll_politely(instance, TARGET_COMMAND_REG,
+ if (NCR5380_poll_politely(hostdata, TARGET_COMMAND_REG,
TCR_LAST_BYTE_SENT,
TCR_LAST_BYTE_SENT, HZ / 64) < 0)
scmd_printk(KERN_ERR, hostdata->connected,