[dpdk-users] DPDK support for 82579

[James Bensley]

On 31 October 2017 at 21:50, Stephen Hemminger
<stephen at networkplumber.org> wrote:
> First off, I assume the device works for normal Linux networking.
> Then check the PCI-id value for the device and see if it is present in drivers/net/e1000
> in DPDK. If not, then it maybe as simple as adding the necessary ID value to the
> table. Also, check current git.
>
> It maybe more complex where some PHY code has to be backported from
> BSD into DPDK. Unfortunately, the device support in DPDK lags behind Linux
> and BSD. There are many variants and even Intel doesn't have resources to
> keep DPDK up to all the current PCI id values.

Hi Stephen,

That has worked! Yes this is a working NIC built into a laptop.

bensley at ubuntu-laptop:/opt/dpdk/dpdk-17.08/drivers/net/e1000$ lspci
-nn | grep Eth
00:19.0 Ethernet controller [0200]: Intel Corporation 82579LM Gigabit
Network Connection [8086:1502] (rev 04)

bensley at ubuntu-laptop:/opt/dpdk/dpdk-17.08/drivers/net/e1000$ grep -r 1502 *
base/e1000_hw.h:#define E1000_DEV_ID_PCH2_LV_LM         0x1502

^ This PCI-id is alread "known" but not mapped to the driver so I just
added the two lines to em_ethdev.c below, recompiled DPDK and Pktgen
and it works...

bensley at ubuntu-laptop:/opt/dpdk/dpdk-17.08/drivers/net/e1000$ grep -r
E1000_DEV_ID_PCH2_LV_LM *
base/e1000_hw.h:#define E1000_DEV_ID_PCH2_LV_LM         0x1502
base/e1000_api.c:   case E1000_DEV_ID_PCH2_LV_LM:
em_ethdev.c:        { RTE_PCI_DEVICE(E1000_INTEL_VENDOR_ID,
E1000_DEV_ID_PCH2_LV_LM) },
em_ethdev.c:        case E1000_DEV_ID_PCH2_LV_LM:


Thanks very much for your help!

Cheers,
James.