[dpdk-dev] Tx vlan offload problem with igb and DPDK v17.11

[Victor Huertas <vhuertas@gmail.com>]

Hi all,

I have realized that the PKT_TX_VLAN_PKT flag for Tx Vlan Offload doesn't
work in my application.

According to the NICs I have (IGB) there seems to be a problem with this
vlan offload tx feature and this version of DPDK according to the Bug 17 :
https://bugs.dpdk.org/show_bug.cgi?id=17

I have tested it using vfio_pci and igb_uio drivers as well as SW vlan
insertion (rte_vlan_insert) and the result is exactly the same.

Have this bug been solved so far?

These are my NICs:
04:00.1 Ethernet controller: Intel Corporation 82576 Gigabit Network
Connection (rev 01)
    Subsystem: Super Micro Computer Inc Device 10c9
    Flags: fast devsel, IRQ 17
    Memory at fafe0000 (32-bit, non-prefetchable) [disabled] [size=128K]
    Memory at fafc0000 (32-bit, non-prefetchable) [disabled] [size=128K]
    I/O ports at ec00 [disabled] [size=32]
    Memory at fafbc000 (32-bit, non-prefetchable) [disabled] [size=16K]
    [virtual] Expansion ROM at faf80000 [disabled] [size=128K]
    Capabilities: [40] Power Management version 3
    Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
    Capabilities: [70] MSI-X: Enable- Count=10 Masked-
    Capabilities: [a0] Express Endpoint, MSI 00
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [140] Device Serial Number 00-30-48-ff-ff-bb-17-02
    Capabilities: [150] Alternative Routing-ID Interpretation (ARI)
    Capabilities: [160] Single Root I/O Virtualization (SR-IOV)
    Kernel driver in use: vfio-pci
    Kernel modules: igb

04:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network
Connection (rev 01)
    Subsystem: Super Micro Computer Inc Device 10c9
    Flags: fast devsel, IRQ 16
    Memory at faf60000 (32-bit, non-prefetchable) [disabled] [size=128K]
    Memory at faf40000 (32-bit, non-prefetchable) [disabled] [size=128K]
    I/O ports at e880 [disabled] [size=32]
    Memory at faf3c000 (32-bit, non-prefetchable) [disabled] [size=16K]
    [virtual] Expansion ROM at faf00000 [disabled] [size=128K]
    Capabilities: [40] Power Management version 3
    Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
    Capabilities: [70] MSI-X: Enable- Count=10 Masked-
    Capabilities: [a0] Express Endpoint, MSI 00
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [140] Device Serial Number 00-30-48-ff-ff-bb-17-02
    Capabilities: [150] Alternative Routing-ID Interpretation (ARI)
    Capabilities: [160] Single Root I/O Virtualization (SR-IOV)
    Kernel driver in use: vfio-pci
    Kernel modules: igb

Thanks for your attention

Regards,

PD: BTW, I have observed that capturing a, for example, an ARP message in
an rx queue which the VLAN stripped the answer is sent correctly if I set
the PKT_TX_VLAN_PKT flag and the VLAN_TCI is the same... However, if I try
to set the VLAN header from a non-VLAN stripped frame then it doesnt work.



-- 
Victor