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| author | Matthew Wilcox <matthew@wil.cx> | 2007-10-05 15:55:09 -0400 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.localdomain> | 2007-10-23 15:12:36 -0400 |
| commit | 4d85b471593d03e141f9160a58574b9204363267 (patch) | |
| tree | 322457b73d4b5872ddb5c0651d8820933f0a68c4 /drivers/scsi/sym53c8xx_2/sym_hipd.h | |
| parent | a44131b35ec1a46ed75014d818cb9d5706117b49 (diff) | |
| download | linux-4d85b471593d03e141f9160a58574b9204363267.tar.gz linux-4d85b471593d03e141f9160a58574b9204363267.tar.bz2 linux-4d85b471593d03e141f9160a58574b9204363267.zip | |
[SCSI] sym53c8xx: Simplify DAC DMA handling
By introducing the use_dac(), set_dac() and DMA_DAC_MASK macros, we can
eliminate a lot of ifdefs from the code. We now rely on the compiler to
optimise away a few things that we'd formerly relied on the preprocessor
to do. This makes sym_setup_bus_dma_mask() small enough to inline into
its only caller.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/sym53c8xx_2/sym_hipd.h')
| -rw-r--r-- | drivers/scsi/sym53c8xx_2/sym_hipd.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.h b/drivers/scsi/sym53c8xx_2/sym_hipd.h index f76b27f0aa2c..4354571a63ef 100644 --- a/drivers/scsi/sym53c8xx_2/sym_hipd.h +++ b/drivers/scsi/sym53c8xx_2/sym_hipd.h @@ -1026,6 +1026,14 @@ struct sym_hcb { #endif }; +#if SYM_CONF_DMA_ADDRESSING_MODE == 0 +#define use_dac(np) 0 +#define set_dac(np) do { } while (0) +#else +#define use_dac(np) (np)->use_dac +#define set_dac(np) (np)->use_dac = 1 +#endif + #define HCB_BA(np, lbl) (np->hcb_ba + offsetof(struct sym_hcb, lbl)) @@ -1068,18 +1076,21 @@ int sym_hcb_attach(struct Scsi_Host *shost, struct sym_fw *fw, struct sym_nvram */ #if SYM_CONF_DMA_ADDRESSING_MODE == 0 +#define DMA_DAC_MASK DMA_32BIT_MASK #define sym_build_sge(np, data, badd, len) \ do { \ (data)->addr = cpu_to_scr(badd); \ (data)->size = cpu_to_scr(len); \ } while (0) #elif SYM_CONF_DMA_ADDRESSING_MODE == 1 +#define DMA_DAC_MASK DMA_40BIT_MASK #define sym_build_sge(np, data, badd, len) \ do { \ (data)->addr = cpu_to_scr(badd); \ (data)->size = cpu_to_scr((((badd) >> 8) & 0xff000000) + len); \ } while (0) #elif SYM_CONF_DMA_ADDRESSING_MODE == 2 +#define DMA_DAC_MASK DMA_64BIT_MASK int sym_lookup_dmap(struct sym_hcb *np, u32 h, int s); static __inline void sym_build_sge(struct sym_hcb *np, struct sym_tblmove *data, u64 badd, int len) |