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ncr5380: Implement NCR5380_dma_xfer_len and remove LIMIT_TRANSFERSIZE macro 

Follow the example of the atari_NCR5380.c core driver and adopt the
NCR5380_dma_xfer_len() hook. Implement NCR5380_dma_xfer_len() for dtc.c
and g_NCR5380.c to take care of the limitations of these cards. Keep the
default for drivers using PSEUDO_DMA.

Eliminate the unused macro LIMIT_TRANSFERSIZE.

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>
This commit is contained in:
Finn Thain 2016-01-03 16:05:25 +11:00 committed by Martin K. Petersen
parent 1d3db59d59
commit ff3d457884
11 changed files with 55 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/scsi/NCR5380.c
View File

@ -201,11 +201,6 @@
* DONT_USE_INTR - if defined, never use interrupts, even if we probe or
* override-configure an IRQ.
*
* LIMIT_TRANSFERSIZE - if defined, limit the pseudo-dma transfers to 512
* bytes at a time. Since interrupts are disabled by default during
* these transfers, we might need this to give reasonable interrupt
* service time if the transfer size gets too large.
*
* LINKED - if defined, linked commands are supported.
*
* PSEUDO_DMA - if defined, PSEUDO DMA is used during the data transfer phases.
@ -2000,29 +1995,12 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
*/
#if defined(PSEUDO_DMA) || defined(REAL_DMA_POLL)
/* KLL
* PSEUDO_DMA is defined here. If this is the g_NCR5380
* driver then it will always be defined, so the
* FLAG_NO_PSEUDO_DMA is used to inhibit PDMA in the base
* NCR5380 case. I think this is a fairly clean solution.
* We supplement these 2 if's with the flag.
*/
#ifdef NCR5380_dma_xfer_len
if (!cmd->device->borken && !(hostdata->flags & FLAG_NO_PSEUDO_DMA) && (transfersize = NCR5380_dma_xfer_len(instance, cmd)) != 0) {
#else
transfersize = cmd->transfersize;
transfersize = 0;
if (!cmd->device->borken &&
!(hostdata->flags & FLAG_NO_PSEUDO_DMA))
transfersize = NCR5380_dma_xfer_len(instance, cmd, phase);
#ifdef LIMIT_TRANSFERSIZE /* If we have problems with interrupt service */
if (transfersize > 512)
transfersize = 512;
#endif /* LIMIT_TRANSFERSIZE */
if (!cmd->device->borken && transfersize && !(hostdata->flags & FLAG_NO_PSEUDO_DMA) && cmd->SCp.this_residual && !(cmd->SCp.this_residual % transfersize)) {
/* Limit transfers to 32K, for xx400 & xx406
* pseudoDMA that transfers in 128 bytes blocks. */
if (transfersize > 32 * 1024)
transfersize = 32 * 1024;
#endif
if (transfersize) {
len = transfersize;
if (NCR5380_transfer_dma(instance, &phase, &len, (unsigned char **) &cmd->SCp.ptr)) {
/*

3
drivers/scsi/arm/cumana_1.c
View File

@ -22,6 +22,9 @@
#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
#define NCR5380_read(reg) cumanascsi_read(instance, reg)
#define NCR5380_write(reg, value) cumanascsi_write(instance, reg, value)
#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
#define NCR5380_intr cumanascsi_intr
#define NCR5380_queue_command cumanascsi_queue_command
#define NCR5380_info cumanascsi_info

2
drivers/scsi/arm/oak.c
View File

@ -26,6 +26,8 @@
#define NCR5380_write(reg, value) \
writeb(value, priv(instance)->base + ((reg) << 2))
#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
#define NCR5380_queue_command oakscsi_queue_command
#define NCR5380_info oakscsi_info
#define NCR5380_show_info oakscsi_show_info

8
drivers/scsi/atari_NCR5380.c
View File

@ -2170,11 +2170,13 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
*/
#if defined(REAL_DMA)
if (
#if !defined(CONFIG_SUN3)
!cmd->device->borken &&
transfersize = 0;
if (!cmd->device->borken)
#endif
(transfersize = NCR5380_dma_xfer_len(instance, cmd, phase)) >= DMA_MIN_SIZE) {
transfersize = NCR5380_dma_xfer_len(instance, cmd, phase);
if (transfersize >= DMA_MIN_SIZE) {
len = transfersize;
cmd->SCp.phase = phase;
if (NCR5380_transfer_dma(instance, &phase,

14
drivers/scsi/dtc.c
View File

@ -419,6 +419,20 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src,
return (0);
}
static int dtc_dma_xfer_len(struct scsi_cmnd *cmd)
{
int transfersize = cmd->transfersize;
/* Limit transfers to 32K, for xx400 & xx406
* pseudoDMA that transfers in 128 bytes blocks.
*/
if (transfersize > 32 * 1024 && cmd->SCp.this_residual &&
!(cmd->SCp.this_residual % transfersize))
transfersize = 32 * 1024;
return transfersize;
}
MODULE_LICENSE("GPL");
#include "NCR5380.c"

3
drivers/scsi/dtc.h
View File

@ -27,6 +27,9 @@
#define NCR5380_read(reg) (readb(DTC_address(reg)))
#define NCR5380_write(reg, value) (writeb(value, DTC_address(reg)))
#define NCR5380_dma_xfer_len(instance, cmd, phase) \
dtc_dma_xfer_len(cmd)
#define NCR5380_intr dtc_intr
#define NCR5380_queue_command dtc_queue_command
#define NCR5380_abort dtc_abort

15
drivers/scsi/g_NCR5380.c
View File

@ -699,6 +699,21 @@ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src,
; // TIMEOUT
return 0;
}
static int generic_NCR5380_dma_xfer_len(struct scsi_cmnd *cmd)
{
int transfersize = cmd->transfersize;
/* Limit transfers to 32K, for xx400 & xx406
* pseudoDMA that transfers in 128 bytes blocks.
*/
if (transfersize > 32 * 1024 && cmd->SCp.this_residual &&
!(cmd->SCp.this_residual % transfersize))
transfersize = 32 * 1024;
return transfersize;
}
#endif /* PSEUDO_DMA */
/*

3
drivers/scsi/g_NCR5380.h
View File

@ -73,6 +73,9 @@
#endif
#define NCR5380_dma_xfer_len(instance, cmd, phase) \
generic_NCR5380_dma_xfer_len(cmd)
#define NCR5380_intr generic_NCR5380_intr
#define NCR5380_queue_command generic_NCR5380_queue_command
#define NCR5380_abort generic_NCR5380_abort

1
drivers/scsi/mac_scsi.c
View File

@ -38,6 +38,7 @@
#define NCR5380_pread macscsi_pread
#define NCR5380_pwrite macscsi_pwrite
#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
#define NCR5380_intr macscsi_intr
#define NCR5380_queue_command macscsi_queue_command

2
drivers/scsi/pas16.h
View File

@ -110,6 +110,8 @@
#define NCR5380_read(reg) ( inb(PAS16_io_port(reg)) )
#define NCR5380_write(reg, value) ( outb((value),PAS16_io_port(reg)) )
#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
#define NCR5380_intr pas16_intr
#define NCR5380_queue_command pas16_queue_command
#define NCR5380_abort pas16_abort

2
drivers/scsi/t128.h
View File

@ -84,6 +84,8 @@
#define NCR5380_read(reg) readb(T128_address(reg))
#define NCR5380_write(reg, value) writeb((value),(T128_address(reg)))
#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
#define NCR5380_intr t128_intr
#define NCR5380_queue_command t128_queue_command
#define NCR5380_abort t128_abort