Anytime a write operation is performed with Reliable Write flag enabled,
the eMMC device is enforced to bypass the cache and do a write to the
underling NVM device by Jedec specification; this causes a performance
penalty since write operations can't be optimized by the device cache.
In our tests, we replayed a typical mobile daily trace pattern and found
~9% overall time reduction in trace replay by using this patch. Also the
write ops within 4KB~64KB chunk size range get a 40~60% performance
improvement by using the patch (as this range of write chunks are the ones
affected by REQ_META).
This patch has been discussed in the Mobile & Embedded Linux Storage Forum
and it's the results of feedbacks from many people. We also checked with
fsdevl and f2fs mailing list developers that this change in the usage of
REQ_META is not affecting FS behavior and we got positive feedbacks.
Reporting here the feedbacks:
http://comments.gmane.org/gmane.linux.file-systems/97219http://thread.gmane.org/gmane.linux.file-systems.f2fs/3178/focus=3183
Change-Id: I2143841c439b47d6ce161ff3ad05277ea867f51b
Signed-off-by: Bruce Ford <bford@micron.com>
Signed-off-by: Luca Porzio <lporzio@micron.com>
Fixes: ce39f9d17c ("mmc: support packed write command for eMMC4.5 devices")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Add a variable to distinguish between types of chips, eg:
DW_MCI_TYPE_RK3228. The purpose is to add a unique code
in the future.
Change-Id: I6608ae7af0579343cabe92deddefe73b8e5d2194
Signed-off-by: xiaoyao <xiaoyao@rock-chips.com>
According to DesignWare DoC file, CardThreshold bit should be
bit[27:16].
So it's correct to use (0xFFF << 16), not (0x1FFF << 16).
Change-Id: I184fff75e6e72624a22cdfc6b0ffcc236ffb07c2
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Vmode is a flag with bit mask, we can't judge interlace mode
from equal compare, need mask its bit.
Change-Id: Iad69bd52173c5ea179639deaff25f9a4ed3fc5d3
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Vmode is a flag with bit mask, we can't judge interlace mode
from equal compare, need mask its bit.
Change-Id: I0cc53503198f98dc58369f4c9e6dd78b47095968
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
rk3288 gpio bank0 only has 24 pins not 32 pins,so modify the gpio map
method for rk3288.
Change-Id: I1d59b25d9acb0f51f9a1ad8ec74db2952534b1f2
Signed-off-by: ZhongYichong <zyc@rock-chips.com>
As stated by the eMMC 5.0 specification, a chip should not be rejected
only because of the revision stated in the EXT_CSD_REV field of the
EXT_CSD register.
Remove the control on this value, the control of the CSD_STRUCTURE field
should be sufficient to reject future incompatible changes.
Change-Id: Ib69314bee902a4036183ef9a3565d9f0423ec971
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
This is just add psci code into kernel, if you want to enable psci,
you must add psci=enable in the Command Line.
Change-Id: Iaf0e0116cbaba0d210cb99d59c0ee82768bf54bb
Signed-off-by: Jianhong Chen <chenjh@rock-chips.com>
The power off sequence is behind of i2c bus shutdown func,
it would prevent the rk818 to do power off action. The irq was
disabled when rk818 power off, it could let rk818 to power off
through i2c bus.
Change-Id: Ia6155f137ab2fa36dbe19e06878b0228670b1398
Signed-off-by: David Wu <wdc@rock-chips.com>
android HDMI CEC HAL need to know cec state when resume,
so we add the HDMI_IOCTL_CECWAKESTATE.
Change-Id: Iff942c6085d10891200cd873cc2ba53e9a2d6cad
Signed-off-by: Shen Zhenyi <szy@rock-chips.com>
if the chip was rk3288, it didn't use pinctrl-rk3368.c,
but pinctrl-rockchip.c, driver of pinctrl-rk3368 was not registered.
It would make the NULL pointer at pinctrl-rk3368 suspend func.
Change-Id: I09dd4fb9b8bf001a4222ed9bef62347785b9906f
Signed-off-by: David Wu <wdc@rock-chips.com>
Add ion ioctl command -ION_IOC_SET_SECURED
for user to set memory region secured.
Change-Id: Ic4a7432ab8d2fd9f60fdfe7457e92f7c99768e12
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
Add function "psci_set_memory_secure" for device to set memory
region secured.
Change-Id: Ife807c91d37ae66a5e1a0a3d8263c68cd601937d
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
