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atari_NCR5380: Remove DMA_MIN_SIZE macro 

Only the atari_scsi and sun3_scsi drivers define DMA_MIN_SIZE.
Both drivers also define NCR5380_dma_xfer_len, which means
DMA_MIN_SIZE can be removed from the core driver.

This removes another discrepancy between the two core drivers.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Finn Thain 2016-03-23 21:10:13 +11:00 committed by Martin K. Petersen
parent e4dec6806a
commit e63449c43a
3 changed files with 22 additions and 19 deletions
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16
drivers/scsi/atari_NCR5380.c
View File

@ -1857,12 +1857,11 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
d = cmd->SCp.ptr;
}
/* this command setup for dma yet? */
if ((count >= DMA_MIN_SIZE) && (sun3_dma_setup_done != cmd)) {
if (cmd->request->cmd_type == REQ_TYPE_FS) {
sun3scsi_dma_setup(instance, d, count,
rq_data_dir(cmd->request));
sun3_dma_setup_done = cmd;
}
if (sun3_dma_setup_done != cmd &&
sun3scsi_dma_xfer_len(count, cmd) > 0) {
sun3scsi_dma_setup(instance, d, count,
rq_data_dir(cmd->request));
sun3_dma_setup_done = cmd;
}
#ifdef SUN3_SCSI_VME
dregs->csr |= CSR_INTR;
@ -1927,7 +1926,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
#endif
transfersize = NCR5380_dma_xfer_len(instance, cmd, phase);
if (transfersize >= DMA_MIN_SIZE) {
if (transfersize > 0) {
len = transfersize;
cmd->SCp.phase = phase;
if (NCR5380_transfer_dma(instance, &phase,
@ -2366,7 +2365,8 @@ static void NCR5380_reselect(struct Scsi_Host *instance)
d = tmp->SCp.ptr;
}
/* setup this command for dma if not already */
if ((count >= DMA_MIN_SIZE) && (sun3_dma_setup_done != tmp)) {
if (sun3_dma_setup_done != tmp &&
sun3scsi_dma_xfer_len(count, tmp) > 0) {
sun3scsi_dma_setup(instance, d, count,
rq_data_dir(tmp->request));
sun3_dma_setup_done = tmp;

6
drivers/scsi/atari_scsi.c
View File

@ -83,11 +83,12 @@
#include <scsi/scsi_host.h>
#define DMA_MIN_SIZE 32
/* Definitions for the core NCR5380 driver. */
#define SUPPORT_TAGS
#define MAX_TAGS 32
#define DMA_MIN_SIZE 32
#define NCR5380_implementation_fields /* none */
@ -605,6 +606,9 @@ static unsigned long atari_dma_xfer_len(unsigned long wanted_len,
{
unsigned long possible_len, limit;
if (wanted_len < DMA_MIN_SIZE)
return 0;
if (IS_A_TT())
/* TT SCSI DMA can transfer arbitrary #bytes */
return wanted_len;

19
drivers/scsi/sun3_scsi.c
View File

@ -36,12 +36,12 @@
#include <scsi/scsi_host.h>
#include "sun3_scsi.h"
/* Definitions for the core NCR5380 driver. */
/* #define SUPPORT_TAGS */
/* minimum number of bytes to do dma on */
#define DMA_MIN_SIZE 129
/* Definitions for the core NCR5380 driver. */
/* #define SUPPORT_TAGS */
/* #define MAX_TAGS 32 */
#define NCR5380_implementation_fields /* none */
@ -61,7 +61,7 @@
#define NCR5380_dma_residual(instance) \
sun3scsi_dma_residual(instance)
#define NCR5380_dma_xfer_len(instance, cmd, phase) \
sun3scsi_dma_xfer_len(cmd->SCp.this_residual, cmd, !((phase) & SR_IO))
sun3scsi_dma_xfer_len(cmd->SCp.this_residual, cmd)
#define NCR5380_acquire_dma_irq(instance) (1)
#define NCR5380_release_dma_irq(instance)
@ -262,14 +262,13 @@ static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)
return last_residual;
}
static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted,
struct scsi_cmnd *cmd,
int write_flag)
static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted_len,
struct scsi_cmnd *cmd)
{
if (cmd->request->cmd_type == REQ_TYPE_FS)
return wanted;
else
if (wanted_len < DMA_MIN_SIZE || cmd->request->cmd_type != REQ_TYPE_FS)
return 0;
return wanted_len;
}
static inline int sun3scsi_dma_start(unsigned long count, unsigned char *data)