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| author | Alex Dubov <oakad@yahoo.com> | 2007-04-12 17:05:25 +1000 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2007-05-01 13:04:15 +0200 |
| commit | 13cdf48ef15befbd36f8295091b9e0f9bd322963 (patch) | |
| tree | d1092ee1a8aaad0ee6feaf6e98f441315bc1f18e /include/linux/tifm.h | |
| parent | 5897d657b58efb244b1f82a912ee93e5141ed14c (diff) | |
| download | linux-13cdf48ef15befbd36f8295091b9e0f9bd322963.tar.gz linux-13cdf48ef15befbd36f8295091b9e0f9bd322963.tar.bz2 linux-13cdf48ef15befbd36f8295091b9e0f9bd322963.zip | |
tifm_sd: implement software scatter-gather
It was found that delays associated with issue and completion of the commands
severely limit performance of the new, fast SD cards. To alleviate this issue
scatter-gather emulation in software is implemented for both dma and pio
transfer modes. Non-block aligned and high memory sg entries are accounted
for.
Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'include/linux/tifm.h')
| -rw-r--r-- | include/linux/tifm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/tifm.h b/include/linux/tifm.h index c8449fcea0c7..7ccad0795466 100644 --- a/include/linux/tifm.h +++ b/include/linux/tifm.h @@ -74,6 +74,7 @@ enum { #define TIFM_DMA_RESET 0x00000002 /* Meaning of this constant is unverified */ #define TIFM_DMA_TX 0x00008000 /* Meaning of this constant is unverified */ #define TIFM_DMA_EN 0x00000001 /* Meaning of this constant is unverified */ +#define TIFM_DMA_TSIZE 0x0000007f #define TIFM_TYPE_XD 1 #define TIFM_TYPE_MS 2 |