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ukex01.SolarFlarecom.com (10.17.10.4) X-TM-AS-Product-Ver: SMEX-12.5.0.1300-8.6.1012-25632.006 X-TM-AS-Result: No-11.443500-8.000000-10 X-TMASE-MatchedRID: X4bcv0S75KnmLzc6AOD8DfHkpkyUphL9APiR4btCEeaXbcZfsC7t1CvC 34sFimMjYTAi6go+ptQjoPs0e9WAKn7cyNXthByNxi///JpaHQNLXPA26IG0hN9RlPzeVuQQlYx eHs++iSPk5YFVuaXpqvowhFsaYCYB9RmNtafDKuE0OtJVkKBtKwZyESFXAljf4mJSqMd68jSP2J OJsCMSBxsguN4Prv59J8B/dpxyWQAQosScSHql5ElABXpquwdlGUqOjzOC7IrcJlOPYiPHbhfev vvLyv3xuArE5O5pdHrF4fG45zJqM4N2Z4yJsRgHolVO7uyOCDWfM+smQZqWkA6QlBHhBZuwy46q zTSht7cFS3cNg6WJZxLm2GUHz1pbTX7PJ/OU3vKDGx/OQ1GV8pPNXDv0GgtYJdW0GbI6Iq6OhzO a6g8KrbwtkZWvdXi06foF6Oy1mNkhLUJtjo1SSxBXZ81j8UbDvIC++lKR+pk= X-TM-AS-User-Approved-Sender: Yes X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--11.443500-8.000000 X-TMASE-Version: SMEX-12.5.0.1300-8.6.1012-25632.006 X-MDID: 1598712774-U0k1phKupPtP Subject: Re: [dpdk-dev] [PATCH v6 1/3] ethdev: add level support for RSS offload types X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 8/21/20 2:03 PM, kirankumark@marvell.com wrote: > From: Kiran Kumar K > > This patch reserves 2 bits as input selection to select Inner and > outer layers for RSS computation. It is combined with existing > ETH_RSS_* to choose Inner or outer layers for L2, L3 and L4. > This functionality already exists in rte_flow through level parameter in > RSS action configuration rte_flow_action_rss. > > Signed-off-by: Kiran Kumar K > --- > V7 Changes: > * Split ethdev and testpmd changes into seperate patches. > > lib/librte_ethdev/rte_ethdev.h | 27 +++++++++++++++++++++++++++ > 1 file changed, 27 insertions(+) > > diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h > index 70295d7ab..2a3a76d37 100644 > --- a/lib/librte_ethdev/rte_ethdev.h > +++ b/lib/librte_ethdev/rte_ethdev.h > @@ -552,6 +552,33 @@ struct rte_eth_rss_conf { > #define RTE_ETH_RSS_L3_PRE64 (1ULL << 53) > #define RTE_ETH_RSS_L3_PRE96 (1ULL << 52) > > +/* > + * We use the following macros to combine with the above layers to choose > + * inner and outer layers or both for RSS computation. > + * Note: Default is 0: inner layers, 1: outer layers, 2: both > + * bit 50 and 51 are reserved for this. > + */ > + > +/** > + * Level 0, It basically stands for the innermost encapsulation level RSS > + * can be performed on according to PMD and device capabilities. > + */ > +#define ETH_RSS_LEVEL_INNER (0ULL << 50) You're trying to refer to struct rte_flow_action_rss level definition when values are chosen, but I think it is inaccurate. Primary definition of the level==0 is PMD default, not inner. Definition says that typically it is the innermost encapsulation level RSS can be performed on according to PMD and device capabilities. But it is secondary, primary definition is "PMD default". Basically unspecified by the caller (structure memset to 0) results in default behaviour. > +/** > + * Level 1, It basically stands for the outermost encapsulation level RSS > + * can be performed on according to PMD and device capabilities. > + */ > +#define ETH_RSS_LEVEL_OUTER (1ULL << 50) > +/** > + * Level 2, It basically stands for the both inner and outermost > + * encapsulation level RSS can be performed on according to PMD and > + * device capabilities. > + */ > +#define ETH_RSS_LEVEL_INNER_OUTER (2ULL << 50) Level equal to 2 is the first after the outermost inner level. Level equal to 3 is the second after the outermost inner level and so on. If we really try to follow level definition from rte_flow_action_rss, the problem is that these defines are used to define RSS hashing capabilities in dev_info.flow_type_rss_offloads. Support for level up to 3 levels, does not mean that we can hash on any, it could be either outermost or innermost level, but not the middle level, if 3 levels are present. Or just innermost recognized: either the first one if no tunnels recognized, the second if two levels are recognized, or the third one if three levels are recognized. Sorry, that I'm not proposing any solution right now. Just need more time to thing about it. You're welcome to try to cover these requirements. > +#define ETH_RSS_LEVEL_MASK (3ULL << 50) > + > +#define ETH_RSS_LEVEL(rss_hf) ((rss_hf & ETH_RSS_LEVEL_MASK) >> 50) > + > /** > * For input set change of hash filter, if SRC_ONLY and DST_ONLY of > * the same level are used simultaneously, it is the same case as > -- > 2.25.1 >