Can't register rteth0 for FEC Ethernet card on SabreLite iMX6Q

sonnguyen · ‎10-16-2014

Hi All,

I'm a new user on RTnet and try to make Rtnet work on Freescale Sabre Lite iMX6Q board. But I got an issue, RTnet can't use rt_fec.ko module driver to register rt_eth0 even though non real time driver is disable.

I'm using:

Linux kernel 3.0.43 download from Xenomai git: http://git.xenomai.org/ipipe-gch.git/?h=ipipe-3.0-imx6q

Xenomai 2.6 download from http://git.xenomai.org/xenomai-2.6.git/

RTnet 0.9.13 download from http://rtnet.org/download.html

Please see my kernel configuration and boot log in attached file.

Xenomai is loaded:

"I-pipe: Domain Xenomai registered.

Xenomai: hal/arm started.

Xenomai: scheduling class idle registered.

Xenomai: scheduling class rt registered.

Xenomai: real-time nucleus v2.6.3 (Lies and Truths) loaded.

Xenomai: debug mode enabled.

Xenomai: starting native API services.

Xenomai: starting POSIX services.

Xenomai: starting RTDM services. "

And FEC ethernet driver (non real-time driver) is loaded when kernel is booting

"FEC Ethernet Driver

fec_enet_mii_bus: probed "

Xenomai is built following install guideline for ARM platform from Xenomai:

http://xenomai.org/installing-xenomai-2-x/

RTnet is built by below command, because SABRE Lite use FEC ethernet card with Micrel KSZ9021 Gigabit chip so I put "--enable-fec" in configure command to build real-time driver for FEC ethernet card:

"./configure --host=armv7l-timesys-linux-gnueabi --with-rtext-config=/home/sonnguyen/rtnet-xenomai-rootfs/usr/xenomai/bin/xeno-config --with-linux=/home/sonnguyen/build/rtnet-xenomai-ipipe-imx6q --enable-rtcfg-dbg --enable-rtwlan --enable-net-routing --enable-router --enable-nomac --enable-rtcap --enable-proxy --enable-checks --enable-fec "

Then

"make DESTDIR=/home/sonnguyen/rtnet-xenomai-rootfs install"

I also changed RT_DRIVER from default value to "rt_fec" in rtnet.conf.

After kernel is booted, I ran "./rtnet start" and got this:

"RTnet: initialising real-time networking

RT FEC Ethernet Driver

./rtnet: line 385: can't create /sys/bus/pci/drivers/rt_fec/bind: nonexistent directory

initializing loopback...

RTnet: registered rtlo

RTcap: real-time capturing interface

ifconfig: SIOCGIFFLAGS: No such device

ifconfig: SIOCGIFFLAGS: No such device

RTcfg: init real-time configuration distribution protocol

RTmac: init realtime media access control

RTmac/TDMA: init time division multiple access control mechanism

ioctl: No such device

ioctl: No such device

ioctl (add): No such device

ioctl (add): No such device

ifconfig: SIOCGIFFLAGS: No such device

Waiting for all slaves...ioctl: No such device

ioctl: No such device "

Then I tried:

"# lspci

lspci: /sys/bus/pci/devices: No such file or directory

# ls /sys/bus/

ac97 hid mdio_bus platform sdio spi

event_source i2c mmc scsi serio usb "

No pci directory under /sys/bus/. Then I thought because the script can't find the ethernet physical bus, it can't register rteth0.

Then I looked into rtnet script and did some minor change. In the script it requires physical ethernet device ID (mentioned in REBIND_RT_NICS), so I tried to find out what it is and got this when make eth0 up with non real-time driver:

"eth0: Freescale FEC PHY driver [Micrel KSZ9021 Gigabit PHY] (mii_bus:phy_addr=1:06, irq=-1)

PHY: 1:06 - Link is Up - 1000/Full "

I think 1:06 is my physical bus ID, then I change the code in rtnet from:

for dev in $REBIND_RT_NICS; do

if [ -d /sys/bus/pci/devices/$dev/driver ]; then

echo $dev > /sys/bus/pci/devices/$dev/driver/unbind

fi

echo $dev > /sys/bus/pci/drivers/$RT_DRIVER/bind

done

To

echo 1:06 > /sys/bus/mdio_bus/drivers/Micrel\ KSZ9021\ Gigabit\ PHY/unbind

echo 1:06 > /sys/bus/platform/drivers/rt_fec/bind

And I tried again with "./rtnet start", this time I got this:

RTnet: initialising real-time networking

RT FEC Ethernet Driver

sh: write error: No such device

initializing loopback...

RTnet: registered rtlo

RTcap: real-time capturing interface

ifconfig: SIOCGIFFLAGS: No such device

RTcfg: init real-time configuration distribution protocol

RTmac: init realtime media access control

RTmac/TDMA: init time division multiple access control mechanism

ioctl: No such device

ioctl (add): No such device

ifconfig: SIOCGIFFLAGS: No such device

Waiting for all slaves...ioctl: No such device

ioctl: No such device

But it still said "No such device"

This is lsmod after I ran ./rtnet start

# lsmod

Module Size Used by Not tainted

tdma 25691 0

rtmac 9724 1 tdma

rtcfg 58071 0

rtcap 7151 0

rt_loopback 1279 2

rtpacket 6365 0

rtudp 10738 0

rt_fec 12742 0

rtipv4 29987 2 rtcfg,rtudp

rtnet 40746 9 tdma,rtmac,rtcfg,rtcap,rt_loopback,rtpacket,rtudp,rt_fec,rtipv4

# ./rtifconfig

rtlo Medium: Local Loopback

IP address: 127.0.0.1

UP LOOPBACK RUNNING MTU: 1500

Only rtlo is registered.

I also tried with kernel linux without non real-time FEC driver (please refer in another config file attached in this email), but still the same issue happened.

Do you have any idea how to solve this issue? I did many search but still can not figure out how to fix it.

Best Regards,

Nguyen Hung Son

Original Attachment has been moved to: kernel_config.zip

Original Attachment has been moved to: kernel_config_without_FEC.zip

Original Attachment has been moved to: rtnet_config.status.zip

Original Attachment has been moved to: rtnet.conf.zip

sonnguyen · ‎10-20-2014

Hi everyone,

Does anyone have an ideal to solve this issue or to know where the issue come from?

Thanks,

Nguyen Hung Son.