[dpdk-users] Unable to launch testpmd with Mellanox ConnectX-3 Pro NIC

[Adrien Mazarguil]

On Tue, Jan 16, 2018 at 06:59:31PM +0300, Timur Bogdanov wrote:
> Hi,
> 
> I'm trying to use dpdk with Mellanox ConnectX-3 Pro NIC.
> I built PMD for it according to instructions on
> "http://dpdk.org/doc/guides/nics/mlx4.html" and tried to launch
> testpmd app but got following error:
<snip>
> PMD: net_mlx4: 0xda13c0: cannot attach flow rules (code 95, "Operation
> not supported"), flow error type 2, cause 0x7f2869cdab80, message:
> flow rule rejected by device
> 
> Fail to start port 0
<snip>
> What can be the reason of testpmd does not start correctly?

Did you provide by any chance -7 instead of -1 as a value for mlx4_core.ko's
log_num_mgm_entry_size parameter (as recommended by the above
documentation)?

Timothy (CC'ed) reported that -7 does not quite work with the default flow
rules (too many limitations) and results in the above error message. -1
should be used, -7 is only for specific use cases and should probably not
even be documented in this file.

-- 
Adrien Mazarguil
6WIND