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authorAndrei Warkentin <andreiw@motorola.com>2011-05-23 15:06:36 -0500
committerChris Ball <cjb@laptop.org>2011-05-25 16:48:46 -0400
commitd0c97cfb81ebc5b416c0f92fa2fc18d2773e3023 (patch)
treedbf0fa49bdad896d283a7f392c156483d9687d4b /include/linux/mmc/mmc.h
parentc59de9287993b5c36f9005f745a3ce0b1008131d (diff)
mmc: core: Use CMD23 for multiblock transfers when we can.
CMD23-prefixed instead of open-ended multiblock transfers have a performance advantage on some MMC cards. Signed-off-by: Andrei Warkentin <andreiw@motorola.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux/mmc/mmc.h')
-rw-r--r--include/linux/mmc/mmc.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 9fa5a73f393d..ac26a685cca8 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -83,6 +83,12 @@
#define MMC_APP_CMD 55 /* ac [31:16] RCA R1 */
#define MMC_GEN_CMD 56 /* adtc [0] RD/WR R1 */
+static inline bool mmc_op_multi(u32 opcode)
+{
+ return opcode == MMC_WRITE_MULTIPLE_BLOCK ||
+ opcode == MMC_READ_MULTIPLE_BLOCK;
+}
+
/*
* MMC_SWITCH argument format:
*