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authorAlex Dubov <oakad@yahoo.com>2007-04-12 17:05:25 +1000
committerPierre Ossman <drzeus@drzeus.cx>2007-05-01 13:04:15 +0200
commit13cdf48ef15befbd36f8295091b9e0f9bd322963 (patch)
treed1092ee1a8aaad0ee6feaf6e98f441315bc1f18e /include
parent5897d657b58efb244b1f82a912ee93e5141ed14c (diff)
downloadop-kernel-dev-13cdf48ef15befbd36f8295091b9e0f9bd322963.zip
op-kernel-dev-13cdf48ef15befbd36f8295091b9e0f9bd322963.tar.gz
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')
-rw-r--r--include/linux/tifm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/tifm.h b/include/linux/tifm.h
index c8449fc..7ccad07 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
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