[dpdk-dev] [PATCH v12 2/3] ethdev: extend RSS offload types
Andrew Rybchenko
arybchenko at solarflare.com
Tue Oct 15 13:09:01 CEST 2019
On 10/15/19 1:55 PM, Su, Simei wrote:
> Hi, Andrew
>
>> -----Original Message-----
>> From: Andrew Rybchenko [mailto:arybchenko at solarflare.com]
>> Sent: Tuesday, October 15, 2019 5:08 PM
>> To: Su, Simei <simei.su at intel.com>; Zhang, Qi Z <qi.z.zhang at intel.com>; Ye,
>> Xiaolong <xiaolong.ye at intel.com>; Yigit, Ferruh <ferruh.yigit at intel.com>
>> Cc: dev at dpdk.org
>> Subject: Re: [dpdk-dev] [PATCH v12 2/3] ethdev: extend RSS offload types
>>
>> On 10/14/19 4:36 PM, Simei Su wrote:
>>> This patch reserves several bits as input set selection from the high
>>> end of the 64 bits. It is combined with exisiting ETH_RSS_* to
>>> represent RSS types. This patch also checks the simultaneous use of
>>> SRC_ONLY and DST_ONLY of the same level.
>>>
>>> Signed-off-by: Simei Su <simei.su at intel.com>
>>> Reviewed-by: Qi Zhang <qi.z.zhang at intel.com>
>>> Acked-by: Ori Kam <orika at mellanox.com>
>>> ---
>>> lib/librte_ethdev/rte_ethdev.c | 5 +++++
>>> lib/librte_ethdev/rte_ethdev.h | 25 +++++++++++++++++++++++++
>>> 2 files changed, 30 insertions(+)
>>>
>>> diff --git a/lib/librte_ethdev/rte_ethdev.c
>>> b/lib/librte_ethdev/rte_ethdev.c index 7caaa0b..69a3d71 100644
>>> --- a/lib/librte_ethdev/rte_ethdev.c
>>> +++ b/lib/librte_ethdev/rte_ethdev.c
>>> @@ -1269,6 +1269,9 @@ struct rte_eth_dev *
>>> goto rollback;
>>> }
>>>
>>> +
>> RTE_ETH_RSS_HF_REFINE(dev->data->dev_conf.rx_adv_conf.rss_conf.rss_
>> hf,
>>> + dev_conf->rx_adv_conf.rss_conf.rss_hf);
>>> +
>>> /* Check that device supports requested rss hash functions. */
>>> if ((dev_info.flow_type_rss_offloads |
>>> dev_conf->rx_adv_conf.rss_conf.rss_hf) != @@ -3112,6 +3115,8
>>> @@ struct rte_eth_dev *
>>> if (ret != 0)
>>> return ret;
>>>
>>> + RTE_ETH_RSS_HF_REFINE(rss_conf->rss_hf, rss_conf->rss_hf);
>>> +
>>> dev = &rte_eth_devices[port_id];
>>> if ((dev_info.flow_type_rss_offloads | rss_conf->rss_hf) !=
>>> dev_info.flow_type_rss_offloads) { diff --git
>>> a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
>>> index 40aa6a3..389a3e6 100644
>>> --- a/lib/librte_ethdev/rte_ethdev.h
>>> +++ b/lib/librte_ethdev/rte_ethdev.h
>>> @@ -165,6 +165,17 @@
>>> #define RTE_ETHDEV_LOG(level, ...) \
>>> rte_log(RTE_LOG_ ## level, rte_eth_dev_logtype, "" __VA_ARGS__)
>>>
>>> +#define RTE_ETH_RSS_HF_REFINE(output, input) do { \
>>> + if ((input & ETH_RSS_L3_SRC_ONLY) && \
>>> + (input & ETH_RSS_L3_DST_ONLY)) \
>>> + output = input & (~(ETH_RSS_L3_SRC_ONLY | \
>>> + ETH_RSS_L3_DST_ONLY)); \
>>> + if ((input & ETH_RSS_L4_SRC_ONLY) && \
>>> + (input & ETH_RSS_L4_DST_ONLY)) \
>>> + output = input & (~(ETH_RSS_L4_SRC_ONLY | \
>>> + ETH_RSS_L4_DST_ONLY)); \
>>> +} while (0)
>>> +
>>> struct rte_mbuf;
>>>
>>> /**
>> Sorry, I missed why macro is used. Inline function is better and easier to read
>> since macros which modify one of its parameters are very error-prone.
> The history is
> [Qi] The consideration is when handle rte_flow_action_rss, we still need to strip it out since this route will bypass the dev_configure or rss_update So there are two options 1, strip out at rte_flow_create , this relief all the PMDs, but code looks a little bit strange.
> 2. handled by PMD themselves
> Anyway both of the cases need this helper function be exposed by rte_ethdev.h, maybe we can define a macro named RTE_ETH_RSS_HF_REFINE?
>
> So I try to use a macro to replace the function of strip_out_src_dst_only. Now, there are two options:
> (1)define a macro in rte_ethdev.h, just like above patch.
> (2)define an inline function "rte_eth_rss_strip_out_src_dst_only" in rte_ethdev.h.
> What do you think? Thanks!
May be inline function rte_eth_rss_hf_refine()?
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