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| author |   Finn Thain <fthain@telegraphics.com.au> | 2016-10-10 00:46:53 -0400 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2016-11-08 17:29:48 -0500 |
| commit | 4a98f896bf2c66a69517fc5e10dc67288cb8da93 (patch) | |
| tree | c543e4ab8a0039eeedffaedf03cbc444a5efa775 /drivers/scsi/NCR5380.h | |
| parent | scsi: ncr5380: Expedite register polling (diff) | |
| download | linux-dev-4a98f896bf2c66a69517fc5e10dc67288cb8da93.tar.xz linux-dev-4a98f896bf2c66a69517fc5e10dc67288cb8da93.zip | |
scsi: ncr5380: Use correct types for DMA routines
Apply prototypes to get consistent function signatures for the DMA
functions implemented in the board-specific drivers. To avoid using
macros to alter actual parameters, some of those functions are reworked
slightly.
This is a step toward the goal of passing the board-specific routines
to the core driver using an ops struct (as in a platform driver or
library module).
This also helps fix some inconsistent types: where the core driver uses
ints (cmd->SCp.this_residual and hostdata->dma_len) for keeping track of
transfers, certain board-specific routines used unsigned long.
While we are fixing these function signatures, pass the hostdata pointer
to DMA routines instead of a Scsi_Host pointer, for shorter and faster
code.
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>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/NCR5380.h')
| -rw-r--r-- | drivers/scsi/NCR5380.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/scsi/NCR5380.h b/drivers/scsi/NCR5380.h index b2c560cb0218..3c6ce5434449 100644 --- a/drivers/scsi/NCR5380.h +++ b/drivers/scsi/NCR5380.h @@ -317,5 +317,30 @@ static inline int NCR5380_poll_politely(struct NCR5380_hostdata *hostdata, reg, bit, val, wait); } +static int NCR5380_dma_xfer_len(struct NCR5380_hostdata *, + struct scsi_cmnd *); +static int NCR5380_dma_send_setup(struct NCR5380_hostdata *, + unsigned char *, int); +static int NCR5380_dma_recv_setup(struct NCR5380_hostdata *, + unsigned char *, int); +static int NCR5380_dma_residual(struct NCR5380_hostdata *); + +static inline int NCR5380_dma_xfer_none(struct NCR5380_hostdata *hostdata, + struct scsi_cmnd *cmd) +{ + return 0; +} + +static inline int NCR5380_dma_setup_none(struct NCR5380_hostdata *hostdata, + unsigned char *data, int count) +{ + return 0; +} + +static inline int NCR5380_dma_residual_none(struct NCR5380_hostdata *hostdata) +{ + return 0; +} + #endif /* __KERNEL__ */ #endif /* NCR5380_H */ |