linux/arch
Sudhakar Rajashekhara ca2afb6dbe davinci: mmc: pass number of SG segments as platform data
On some platforms like DM355, the number of EDMA parameter slots available
for EDMA_SLOT_ANY usage are few.  In such cases, if MMC/SD uses 16 slots
for each instance of MMC controller, then the number of slots available
for other modules will be very few.

By passing the number of EDMA slots to be used in MMC driver from platform
data, EDMA slots available for other purposes can be controlled.

Most of the platforms will not use this platform data variable.  But on
DM355, as the number of EDMA resources available is limited, the number of
scatter- gather segments used inside the MMC driver can be 8 (passed as
platform data) instead of 16.  On DM355, when the number of scatter-gather
segments was reduced to 8, I saw a performance difference of about
0.25-0.4 Mbytes/sec during write.  Read performance variations were
negligible.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-27 09:12:39 -07:00
..
alpha Revert "endian: #define __BYTE_ORDER" 2010-05-26 08:30:15 -07:00
arm davinci: mmc: pass number of SG segments as platform data 2010-05-27 09:12:39 -07:00
avr32 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-05-20 09:20:59 -07:00
blackfin Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin 2010-05-24 08:02:58 -07:00
cris fix handling of offsets in cris eeprom.c, get rid of fake on-stack files 2010-05-21 18:31:29 -04:00
frv frv: set ARCH_KMALLOC_MINALIGN 2010-05-25 08:07:02 -07:00
h8300 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-05-20 09:20:59 -07:00
ia64 Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
m32r Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-05-20 09:20:59 -07:00
m68k Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu 2010-05-25 12:03:17 -07:00
m68knommu arch/m68knommu/platform/68360/commproc.c: Checkpatch cleanup 2010-05-24 14:44:25 +10:00
microblaze Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
mips Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus 2010-05-21 15:23:54 -07:00
mn10300 mn10300: set ARCH_KMALLOC_MINALIGN 2010-05-25 08:07:02 -07:00
parisc Merge git://git.infradead.org/iommu-2.6 2010-05-21 17:25:01 -07:00
powerpc Revert "endian: #define __BYTE_ORDER" 2010-05-26 08:30:15 -07:00
s390 Revert "endian: #define __BYTE_ORDER" 2010-05-26 08:30:15 -07:00
score add descriptive comment for TIF_MEMDIE task flag declaration. 2010-05-14 11:13:27 +02:00
sh Revert "endian: #define __BYTE_ORDER" 2010-05-26 08:30:15 -07:00
sparc Revert "endian: #define __BYTE_ORDER" 2010-05-26 08:30:15 -07:00
um Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
x86 Revert "endian: #define __BYTE_ORDER" 2010-05-26 08:30:15 -07:00
xtensa xtensa: includecheck fix: vectors.S 2010-05-25 08:06:56 -07:00
.gitignore
Kconfig hw-breakpoints: Separate constraint space for data and instruction breakpoints 2010-05-01 04:32:11 +02:00