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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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19cc75249a
This change adds the ability for flow steering to classify IPv4/6 packets with MPLS tag (Ethertype 0x8847 and 0x8848) as standard IP packets and hit IPv4/6 classifed steering rules. When user added a flow rule with IP classification, driver was implicitly adding ethertype matching to the created rule in order to distinguish between IPv4 and IPv6 protocols. Since IP packets with MPLS tag header have MPLS ethertype, they missed the rule and ended up hitting the default filters. Such behavior prevented from MPLS packets to undergo inbound traffic load balancing flows (if such were defined by configuring RSS) to achieve higher throughput - the way that non-MPLS IP packets performed. Since our device is able to look past the MPLS tag and identify the next protocol we introduce this solution which replaces Ethertype matching by the device's capability to perform IP version parsing and matching in order to distinguish between IPv4 and IPv6. Therefore, whenever a flow with IP spec is added and device support IP version matching, driver will implicitly add IP version matching to the rule (Based on the IP spec type) without Ethertype matching which will cause relevant MPLS tagged packets to hit this rule as well. Otherwise (device doesn't support IP version matching), we fall back to setting Ethertype matching. If the user's filters specify an L2 ethertype and an IP spec the rule will then match both the ethertype and the IP version. The device's support for IP version matching is reported by the device via dedicated capability bit in query_device_cap and named outer/inner_ip_version. Signed-off-by: Ariel Levkovich <lariel@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com> |
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