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Date: Fri, 10 Jun 2011 09:52:08 -0700
From: Barry G <mr.scada@...il.com>
To: netdev@...r.kernel.org, buytenh@...tstofly.org
Subject: No traffic flow with Marvell 88E6095F using DSA
Hello all,
We are trying to bring up a board with two Marvell 88E6095F chips and
one 88E6185 chip using the Distributed Switch Architecture (DSA)
facilities in the kernel.
We have a rough driver working, but we can't get traffic to flow in
or out of the Marvell chips.
To simplify the system, I am trying to bring up only the chip
attached to the CPU (88E6095F). I have a dsa_chip_data with
static struct dsa_chip_data switches[] = {
{
.sw_addr = 0x9,
.port_names = {
"eth%d", //0
"eth%d", //1
"eth%d", //2
"eth%d", //3
"eth%d", //4
"eth%d", //5
"eth%d", //6
"eth%d", //7
NULL, //8
NULL, //9
"cpu", //10
},
}
};
port 8 and 9 are DSA interfaces to other chips.
The host CPU is an Freescale 8308 hooked up to TSEC1.
We are using the mdio bus from the processor to drive
the mdio on the Marells.
Using this configuration with the driver shell I posted
previously the system boots and I see:
Distributed Switch Architecture driver version 0.1
eth0[0]: detected a Marvell 88E6095/88E6095F switch
dsa slave smi: probed
All good. If I run ip link show I get:
# ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:30:a7:aa:aa:01 brd ff:ff:ff:ff:ff:ff
4: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:30:a7:aa:aa:02 brd ff:ff:ff:ff:ff:ff
5: teql0: <NOARP> mtu 1500 qdisc noop qlen 100
link/void
6: tunl0: <NOARP> mtu 1480 qdisc noop
link/ipip 0.0.0.0 brd 0.0.0.0
7: eth2@...0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
link/ether 00:30:a7:aa:aa:01 brd ff:ff:ff:ff:ff:ff
8: eth3@...0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
link/ether 00:30:a7:aa:aa:01 brd ff:ff:ff:ff:ff:ff
9: eth4@...0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
link/ether 00:30:a7:aa:aa:01 brd ff:ff:ff:ff:ff:ff
10: eth5@...0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
link/ether 00:30:a7:aa:aa:01 brd ff:ff:ff:ff:ff:ff
11: eth6@...0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
link/ether 00:30:a7:aa:aa:01 brd ff:ff:ff:ff:ff:ff
12: eth7@...0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
link/ether 00:30:a7:aa:aa:01 brd ff:ff:ff:ff:ff:ff
13: eth8@...0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
link/ether 00:30:a7:aa:aa:01 brd ff:ff:ff:ff:ff:ff
14: eth9@...0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
link/ether 00:30:a7:aa:aa:01 brd ff:ff:ff:ff:ff:ff
This is after running "ip link set dev eth0 up" and "ip link set dev eth9 up"
Eth9 is hooked up to a cable. Removing the cable results in the
"eth9: link down" message and plugging it back in gives the "eth9:
link up, 100 Mb/s, half duplex, flow control disabled".
So it looks like everything is stellar, but we can't get traffic
to leave the device. I configure eth9 with an address (192.168.1.50/24)
and I try to ping 192.168.1.25 I get the following with tcpdump on eth9:
20:23:11.682628 arp who-has 192.168.1.25 tell 192.168.1.50 (repeats)
And on eth0 I see:
20:23:54.692701 00:30:a7:aa:aa:01 (oui Unknown) > Broadcast, ethertype
Unknown (0x4038), length 46:
0x0000: 0000 0806 0001 0800 0604 0001 0030 a7aa .............0..
0x0010: aa01 c0a8 0132 0000 0000 0000 c0a8 0119 .....2..........
However if I hook up to the port with wireshark I see nothing leaving
the port. Likewise if I attempt to ping into the device from 192.168.1.25
I see nothing coming in on the tcpdump for eth0 or eth9.
Linux seems happy:
# ./sbin/mii-tool -v eth9
eth9: no autonegotiation, 100baseTx-HD, link ok
product info: vendor 00:50:43, model 8 rev 5
basic mode: autonegotiation enabled
basic status: autonegotiation complete, link ok
capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
advertising: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
link partner: 100baseTx-HD
# ethtool -S eth9
NIC statistics:
tx_packets: 1534
tx_bytes: 64428
rx_packets: 0
rx_bytes: 0
in_good_octets: 151080
in_bad_octets: 0
in_unicast: 0
in_broadcasts: 2035
in_multicasts: 78
in_pause: 0
in_undersize: 0
in_fragments: 0
in_oversize: 0
in_jabber: 0
in_rx_error: 0
in_fcs_error: 0
out_octets: 0
out_unicast: 0
out_broadcasts: 0
out_multicasts: 0
out_pause: 0
excessive: 0
collisions: 0
deferred: 0
single: 0
multiple: 0
out_fcs_error: 0
late: 0
hist_64bytes: 2045
hist_65_127bytes: 9
hist_128_255bytes: 16
hist_256_511bytes: 43
hist_512_1023bytes: 0
hist_1024_max_bytes: 0
#
# cat /proc/net/dev
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed
multicast|bytes packets errs drop fifo colls carrier compressed
lo: 194432 1736 0 0 0 0 0 0
194432 1736 0 0 0 0 0 0
bond0: 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
eth0: 0 0 0 0 0 0 0 0
77326 1681 6 0 6 0 0 0
eth1: 531776 5611 0 349 0 0 0 0
814765 3305 0 0 0 0 0 0
teql0: 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
tunl0: 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
eth2: 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
eth3: 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
eth4: 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
eth5: 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
eth6: 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
eth7: 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
eth8: 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
eth9: 0 0 0 0 0 0 0 0
70602 1681 0 0 0 0 0 0
This problem looks really similar to the thread at:
http://kerneltrap.org/mailarchive/linux-netdev/2009/3/7/5116114/thread
but I have the patch Gary presents already in the tree :-(
I am running 2.6.39-rc4+.
Any help or guidance would be appreciated! How can I
best approach debugging this issue?
Thanks,
Barry
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