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Christian Lamparter 8a0ad2660a apm821xx: fix sata access freezes
The original vendor's driver programmed the dma controller's
AHB HPROT values to enable bufferable, privileged mode. This
along with the "same priorty for both channels" fixes the
freezes according to @takimata, @And.short, that have been
reported on the forum by @ticerex.

Furtheremore, @takimata reported that the patch also improved
the performance of the HDDs considerably:
|<https://forum.lede-project.org/t/wd-mybook-live-duo-two-disks/16195/55>
|It seems your patch unleashed the full power of the SATA port.
|Where I was previously hitting a really hard limit at around
|82 MB/s for reading and 27 MB/s for writing, I am now getting this:
|
|root@OpenWrt:/mnt# time dd if=/dev/zero of=tempfile bs=1M count=1024
|1024+0 records in
|1024+0 records out
|real    0m 13.65s
|user    0m 0.01s
|sys     0m 11.89s
|
|root@OpenWrt:/mnt# time dd if=tempfile of=/dev/null bs=1M count=1024
|1024+0 records in
|1024+0 records out
|real    0m 8.41s
|user    0m 0.01s
|sys     0m 4.70s
|
|This means: 121 MB/s reading and 75 MB/s writing!
|
|[...]
|
|The drive is a WD Green WD10EARX taken from an older MBL Single.
|I repeated the test a few times with even larger files to rule out
|any caching, I'm still seeing the same great performance. OpenWrt is
|now completely on par with the original MBL firmware's performance.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
2018-07-19 18:54:40 +02:00
.github merge: github: use OpenWrt in issue/pr templates 2018-01-03 20:36:57 +01:00
config config: fix ARM64 dependency check 2018-02-10 20:16:39 +01:00
include OpenWrt v18.06.0-rc2: revert to branch defaults 2018-07-15 17:54:39 +02:00
package base-files: fix wrong sysctl parameter order 2018-07-18 19:20:07 +02:00
scripts include/feeds.mk: rework generation of opkg distfeeds.conf 2018-07-12 21:26:42 +02:00
target apm821xx: fix sata access freezes 2018-07-19 18:54:40 +02:00
toolchain musl: sys/socket.h: fix SO_PEERSEC value on MIPS 2018-06-24 17:28:50 +02:00
tools ar71xx: Add support for TP-Link CPE210 v2 2018-06-23 16:08:22 +02:00
.gitattributes add .gitattributes to prevent the git autocrlf option from messing with CRLF/LF in files 2012-05-08 13:30:49 +00:00
.gitignore .gitignore: add .project & .cproject for eclipse users 2018-01-17 11:07:17 +01:00
BSDmakefile add missing copyright header 2007-02-26 01:05:09 +00:00
Config.in merge: base: update base-files and basic config 2017-12-08 19:41:18 +01:00
feeds.conf.default OpenWrt v18.06.0-rc2: revert to branch defaults 2018-07-15 17:54:39 +02:00
LICENSE finally move buildroot-ng to trunk 2016-03-20 17:29:15 +01:00
Makefile merge: base: update base-files and basic config 2017-12-08 19:41:18 +01:00
README merge: base: update base-files and basic config 2017-12-08 19:41:18 +01:00
rules.mk imagebuilder: reuse rootfs preparation from rootfs.mk 2018-03-07 09:59:08 +01:00

This is the buildsystem for the OpenWrt Linux distribution.

Please use "make menuconfig" to choose your preferred
configuration for the toolchain and firmware.

You need to have installed gcc, binutils, bzip2, flex, python, perl, make,
find, grep, diff, unzip, gawk, getopt, subversion, libz-dev and libc headers.

Run "./scripts/feeds update -a" to get all the latest package definitions
defined in feeds.conf / feeds.conf.default respectively
and "./scripts/feeds install -a" to install symlinks of all of them into
package/feeds/.

Use "make menuconfig" to configure your image.

Simply running "make" will build your firmware.
It will download all sources, build the cross-compile toolchain, 
the kernel and all choosen applications.

To build your own firmware you need to have access to a Linux, BSD or MacOSX system
(case-sensitive filesystem required). Cygwin will not be supported because of
the lack of case sensitiveness in the file system.


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