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InfiniBand Network Architecture by MindShare, Inc., Tom Shanley

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Requester QP's SQ Logic Operation

Start PSN Assignment and PSN Management

As previously described in “RC/UC Connection Establishment” on page 186, the SQ Logic's Start PSN is assigned during QP setup.

As the SQ Logic generates each outbound request packet, it sets the BTH:PSN to the previous PSN + 1.

Request Packet Opcodes and Packet Sequences

The valid UC request packet opcodes are shown in Table 18-1 on this page. Since there are no response packets used in this transport service type, no response opcodes are defined.

The valid request packet transmission sequences are defined in Table 18-2 on page 447.

Table 18-1. Packet UC Request Packet Opcodes
Bits 7:5Bits 4:0Packet TypeFields That Follow BTH
001 UC00000SEND FirstData Payload
00001SEND Middle ...

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