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ncr5380: Implement NCR5380_dma_xfer_len and remove LIMIT_TRANSFERSIZE macro

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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
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14
drivers/scsi/dtc.c
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@@ -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"