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| author | Finn Thain <fthain@telegraphics.com.au> | 2016-03-23 21:10:31 +1100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-04-11 16:57:09 -0400 |
| commit | 3a0f64bfa90700c4fa9db0ed2d701300edd9a0b3 (patch) | |
| tree | c115966bfb47370b38e0c14b2dd0b95736e8892c /drivers/scsi/NCR5380.h | |
| parent | ded155b5e4e735bdd654306145dff6491ce85766 (diff) | |
| download | linux-3a0f64bfa90700c4fa9db0ed2d701300edd9a0b3.tar.gz linux-3a0f64bfa90700c4fa9db0ed2d701300edd9a0b3.tar.bz2 linux-3a0f64bfa90700c4fa9db0ed2d701300edd9a0b3.zip | |
mac_scsi: Fix pseudo DMA implementation
Fix various issues: Comments about bus errors are incorrect. The
PDMA asm must return the size of the memory access that faulted so the
transfer count can be adjusted accordingly. A phase change may cause a
bus error but should not be treated as failure. A bus error does not
always imply a phase change and generally the transfer may continue.
Scatter/gather doesn't seem to work with PDMA due to overruns. This is
a pity because peak throughput seems to double with SG_ALL.
Tested on a Mac LC III and a PowerBook 520.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/NCR5380.h')
| -rw-r--r-- | drivers/scsi/NCR5380.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/NCR5380.h b/drivers/scsi/NCR5380.h index 076f8969dd22..c60728785d89 100644 --- a/drivers/scsi/NCR5380.h +++ b/drivers/scsi/NCR5380.h @@ -292,6 +292,8 @@ static void NCR5380_reselect(struct Scsi_Host *instance); static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *, struct scsi_cmnd *); static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data); static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data); +static int NCR5380_poll_politely(struct Scsi_Host *, int, int, int, int); +static int NCR5380_poll_politely2(struct Scsi_Host *, int, int, int, int, int, int, int); #endif /* __KERNEL__ */ #endif /* NCR5380_H */ |