diff options
| author | Micky Ching <micky_ching@realsil.com.cn> | 2014-02-17 12:45:48 +0400 |
|---|---|---|
| committer | Chris Ball <chris@printf.net> | 2014-02-22 22:34:20 +0400 |
| commit | c42deffd5b53c9e583d83c7964854ede2f12410d (patch) | |
| tree | 9f243972c38e08f15e612a9a13489a6b2db3ddd2 /include/linux/mfd/rtsx_common.h | |
| parent | abcc6b2943145ae2e17a52632ccab50cd612914c (diff) | |
| download | linux-c42deffd5b53c9e583d83c7964854ede2f12410d.tar.xz | |
mmc: rtsx: add support for pre_req and post_req
Add support for non-blocking request, pre_req() runs dma_map_sg() and
post_req() runs dma_unmap_sg(). This patch can increase card read/write
speed, especially for high speed card and slow CPU(for some embedded
platform).
Users can get a great benefit from this patch. if CPU frequency is 800MHz,
SDR104 or DDR50 card read/write speed may increase more than 15%.
test results:
intel i3(800MHz - 2.3GHz), SD card clock 208MHz
performance mode(2.3GHz):
Before:
dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024
67108864 bytes (67 MB) copied, 1.18191 s, 56.8 MB/s
After:
dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024
67108864 bytes (67 MB) copied, 1.09276 s, 61.4 MB/s
powersave mode(800MHz):
Before:
dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024
67108864 bytes (67 MB) copied, 1.29569 s, 51.8 MB/s
After:
dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024
67108864 bytes (67 MB) copied, 1.11218 s, 60.3 MB/s
Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'include/linux/mfd/rtsx_common.h')
| -rw-r--r-- | include/linux/mfd/rtsx_common.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mfd/rtsx_common.h b/include/linux/mfd/rtsx_common.h index 443176ee1ab0..7c36cc55d2c7 100644 --- a/include/linux/mfd/rtsx_common.h +++ b/include/linux/mfd/rtsx_common.h @@ -45,6 +45,7 @@ struct platform_device; struct rtsx_slot { struct platform_device *p_dev; void (*card_event)(struct platform_device *p_dev); + void (*done_transfer)(struct platform_device *p_dev); }; #endif |