diff options
| author | Finn Thain <fthain@telegraphics.com.au> | 2016-03-23 10:10:10 (GMT) |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-04-11 20:57:09 (GMT) |
| commit | 9d376402c80cfe2356d84577d366ca790e576bd9 (patch) | |
| tree | 83b3b800e6866c22c161df43e188a6e4be73ae74 /drivers/scsi/g_NCR5380.h | |
| parent | e1f0bce3a0db95007fec756225801e50477f32fd (diff) | |
| download | linux-9d376402c80cfe2356d84577d366ca790e576bd9.tar.xz | |
g_ncr5380: Remove CONFIG_SCSI_GENERIC_NCR53C400
This change brings a number of improvements: fewer macros, better test
coverage, simpler code and sane Kconfig options. The downside is a small
chance of incompatibility (which seems unavoidable).
CONFIG_SCSI_GENERIC_NCR53C400 exists to enable or inhibit pseudo DMA
transfers when the driver is used with 53C400-compatible cards. Thanks to
Ondrej Zary's patches, PDMA now works which means it can be enabled
unconditionally.
Due to bad design, CONFIG_SCSI_GENERIC_NCR53C400 ties together unrelated
functionality as it sets both PSEUDO_DMA and BIOSPARAM macros. This patch
effectively enables PSEUDO_DMA and disables BIOSPARAM.
The defconfigs and the Kconfig default leave CONFIG_SCSI_GENERIC_NCR53C400
undefined. Red Hat 9 and CentOS 2.1 were the same. This leaves both
PSEUDO_DMA and BIOSPARAM disabled. The effect of this patch should be
better performance from enabling PSEUDO_DMA.
On the other hand, Debian 4 and SLES 10 had CONFIG_SCSI_GENERIC_NCR53C400
enabled, so both PSEUDO_DMA and BIOSPARAM were enabled. This patch might
affect configurations like this by disabling BIOSPARAM. My best guess is
that this could be a problem only in the vanishingly rare case that
1) the CHS values stored in the boot device partition table are wrong and
2) a 5380 card is in use (because PDMA on 53C400 used to be broken).
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/g_NCR5380.h')
| -rw-r--r-- | drivers/scsi/g_NCR5380.h | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/drivers/scsi/g_NCR5380.h b/drivers/scsi/g_NCR5380.h index 6f3d2ac..1ca3743 100644 --- a/drivers/scsi/g_NCR5380.h +++ b/drivers/scsi/g_NCR5380.h @@ -14,13 +14,6 @@ #ifndef GENERIC_NCR5380_H #define GENERIC_NCR5380_H -#ifdef CONFIG_SCSI_GENERIC_NCR53C400 -#define BIOSPARAM -#define NCR5380_BIOSPARAM generic_NCR5380_biosparam -#else -#define NCR5380_BIOSPARAM NULL -#endif - #define __STRVAL(x) #x #define STRVAL(x) __STRVAL(x) @@ -30,12 +23,6 @@ #define NCR5380_map_type int #define NCR5380_map_name port -#ifdef CONFIG_SCSI_GENERIC_NCR53C400 -#define NCR5380_region_size 16 -#else -#define NCR5380_region_size 8 -#endif - #define NCR5380_read(reg) \ inb(instance->io_port + (reg)) #define NCR5380_write(reg, value) \ @@ -55,7 +42,7 @@ #define NCR5380_map_name base #define NCR53C400_mem_base 0x3880 #define NCR53C400_host_buffer 0x3900 -#define NCR5380_region_size 0x3a00 +#define NCR53C400_region_size 0x3a00 #define NCR5380_read(reg) \ readb(((struct NCR5380_hostdata *)shost_priv(instance))->iomem + \ @@ -66,6 +53,7 @@ #define NCR5380_implementation_fields \ void __iomem *iomem; \ + resource_size_t iomem_size; \ int c400_ctl_status; \ int c400_blk_cnt; \ int c400_host_buf; |