Raw QP Support Requirement

It is optional whether or not an HCA or TCA implements the raw QP types. Software local to an HCA can determine the HCA's capabilities by executing the Query HCA verb. On return, the following information is provided to the caller:

  • The maximum number of Raw IPv6 Datagram QPs supported by this HCA. This value is zero if Raw IPv6 Datagrams are not supported.

  • The maximum number of Raw Ethertype Datagram QPs supported by this HCA. This value is zero if Raw Ethertype Datagrams are not supported.

  • Ability of this HCA to support raw packet multicast.

To discover whether or not a remote CA supports raw QPs, the CM may send a Get(ClassPortInfo) GMP packet to each port's GSI on the remote CA. Bit 11 in the ClassPortInfo.CapabilityMask indicates whether the CA supports raw QPs on the port. It should be noted, however, that it doesn't indicate which type of raw QPs are supported (IPv6 or EtherType).

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