From 13cdf48ef15befbd36f8295091b9e0f9bd322963 Mon Sep 17 00:00:00 2001 From: Alex Dubov Date: Thu, 12 Apr 2007 17:05:25 +1000 Subject: 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 Signed-off-by: Pierre Ossman --- include/linux/tifm.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/tifm.h') 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 -- cgit v1.2.3