Red Hat Bugzilla – Bug 437959
via-velocity ignores multicast traffic until it has entered and left promiscuous or allmulti mode
Last modified: 2009-01-09 01:13:00 EST
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Description of problem:
We have a system with a Jetway J7F5M2G motherboard, using a VIA Velocity gigabit ethernet chip. When it boots, it ignores all multicast traffic; we can get it to listen for multicast traffic by switching allmulti or promisc on, then off again:
ifconfig eth0 allmulti ; ifconfig eth0 -allmulti
ifconfig eth0 promisc ; ifconfig eth0 -promisc
lspci on an affected box:
00:00.0 Host bridge: VIA Technologies, Inc. CX700 Host Bridge (rev 03)
00:00.1 Host bridge: VIA Technologies, Inc. CX700 Host Bridge
00:00.2 Host bridge: VIA Technologies, Inc. CX700 Host Bridge
00:00.3 Host bridge: VIA Technologies, Inc. CX700 Host Bridge
00:00.4 Host bridge: VIA Technologies, Inc. CX700 Host Bridge
00:00.7 Host bridge: VIA Technologies, Inc. CX700 Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
00:0f.0 IDE interface: VIA Technologies, Inc. CX700M2 IDE
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 90)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 90)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 90)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 90)
00:11.0 ISA bridge: VIA Technologies, Inc. CX700 PCI to ISA Bridge
00:11.7 Host bridge: VIA Technologies, Inc. CX700 Internal Module Bus
00:13.0 Host bridge: VIA Technologies, Inc. CX700 Host Bridge
00:13.1 PCI bridge: VIA Technologies, Inc. CX700 PCI to PCI Bridge
01:00.0 VGA compatible controller: VIA Technologies, Inc. CX700M2 UniChrome PRO II Graphics (rev 03)
02:03.0 Multimedia controller: Philips Semiconductors SAA7133/SAA7135 Video Broadcast Decoder (rev d1)
02:05.0 Ethernet controller: VIA Technologies, Inc. VT6120/VT6121/VT6122 Gigabit Ethernet Adapter (rev 11)
02:08.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host Controller (rev 80)
80:01.0 Audio device: VIA Technologies, Inc. VIA High Definition Audio Controller (rev 10)
And specifically for the ethernet controller.
# lspci -vvvvvxn -s 02:05.0
02:05.0 0200: 1106:3119 (rev 11)
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 32 (750ns min, 2000ns max), Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 20
Region 0: I/O ports at dc00 [size=256]
Region 1: Memory at dfefe000 (32-bit, non-prefetchable) [size=256]
Capabilities:  Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Kernel driver in use: via-velocity
Kernel modules: via-velocity
00: 06 11 19 31 07 00 30 02 11 00 00 02 10 20 00 00
10: 01 dc 00 00 00 e0 ef df 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 06 11 10 01
30: 00 00 00 00 50 00 00 00 00 00 00 00 0b 01 03 08
I can run any tests you like on the box.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Install Fedora on a box with a VIA Velocity ethernet chip. Boot on a network with multicast traffic; see the box ignore the multicast traffic completely.
Further to the report; once we've set allmulti or promisc mode, the chip stops
filtering multicast traffic, even though we've disabled promisc or allmulti.
<dwmw2> rebuild driver with some printks in velocity_set_multi() to see what
it's doing (and if it's actually being called at the right times)
<farnz> dwmw2: Did that at the time - it's apparently setting the right stuff,
but the chip ignores it.
Do we have access to VIA docs? If not, maybe we should put it into allmulti mode
at all times if the multicast filtering isn't working.
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