[dpdk-users] Flow director struct rte_flow_item_raw guild
barbette at kth.se
Thu May 16 08:00:29 CEST 2019
I learned to look at the datasheet first, or look at the code before
using "fancy" patterns (specially for Mellanox products that have no
Another way is to just try testpmd "flow create ..." quickly and see how
Eg, for x520, you will have only access to what is called the 2 flex
bytes, see the 82599 datasheet.
If you grep the code you'll see the constraint are quite huge :
It will fail if any of these is true :
raw_mask->pattern != 0xff ||
raw_mask->pattern != 0xff)
--> It's a fixed value search on two bytes. And you'll have to set that
value for all patterns if I remember the datasheet correctly.
raw_spec->relative != 0 ||
raw_spec->search != 0 ||
raw_spec->reserved != 0 ||
raw_spec->offset > IXGBE_MAX_FLX_SOURCE_OFF ||
raw_spec->offset % 2 ||
raw_spec->limit != 0 ||
raw_spec->length != 2 ||
/* pattern can't be 0xffff */
(raw_spec->pattern == 0xff &&
raw_spec->pattern == 0xff))
I think XL710 (i40e) will be as restrained. From what I remember the
flex bytes became a flex payload bytes. So you can't even match on the
For relevance, other mask stuff :
raw_mask->relative != 0x1 ||
raw_mask->search != 0x1 ||
raw_mask->reserved != 0x0 ||
(uint32_t)raw_mask->offset != 0xffffffff ||
raw_mask->limit != 0xffff ||
raw_mask->length != 0xffff
Le 16/05/2019 à 07:34, 曾懷恩 a écrit :
> Hi Adrien,
> Thanks for reply,
> I tried to trace the mlx5 and ixgbe driver source code in DPDK source and notice that the flow director APIs are processed in it.
> I also compared the difference of flow director APIs between both two drivers and found that there is no rte_flow_item_raw defined in mlx5 driver.
> Is there any possible mlx5 series NICs support rte_flow_item_raw in the future?
> Thanks a lot.
> Best Regards,
>> Adrien Mazarguil <adrien.mazarguil at 6wind.com> 於 2019年5月13日 下午4:49 寫道：
>> On Sat, May 11, 2019 at 02:20:48AM +0800, Huai-En Tseng wrote:
>>> Thanks for reply,
>>> Actually I’d like to use rte_flow_item_raw structure with PPP header, the ICMP format is my little trial.
>> OK, makes sense, there's no pattern item for PPP yet.
>>> I will try X520 next week.
>>> Another question, is ixgbevf also support RTE_FLOW_ITEM_RAW?
>> The ixgbe driver looks like it does but I'm not sure regarding the VF
>> variant, Cc'ing maintainers just in case.
>> Adrien Mazarguil
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