GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-22 14:41:27 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

tifm_sd: implement software scatter-gather

Browse source 
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>
This commit is contained in:
Alex Dubov 2007-04-12 17:05:25 +10:00 • committed by Pierre Ossman
parent 5897d657b5
commit 13cdf48ef1
2 changed files with 299 additions and 149 deletions
Download patch file Download diff file Expand all files Collapse all files

1
include/linux/tifm.h
View file

@ -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