Method and apparatus for implementing infiniband transmit queue

Apparatus for implementing a transmit queue in a network system comprising:

• a queue pair context memory for storing a set of pointers for each queue pair;
• a dynamic random access memory (DRAM) for storing payload data for each said queue pair;
• a packet builder coupled to said DRAM for sending packets for a queue pair;
• a transmit sequencer coupled to said queue pair context memory, said DRAM, and said packet builder;
• said transmit sequencer for utilizing said set of pointers to control the transmit queue and for signaling said packet builder for sending packets for said queue pair;
• said transmit sequencer, responsive to an identified error for said queue pair, for utilizing a limit pointer stored in said queue pair context memory to identify a last request for processing after said error.

A computer program product for implementing a transmit queue in a network system, said computer program product including a plurality of computer executable instructions stored on a computer readable medium, wherein said instructions, when executed by the network system, cause the network system to perform the steps of:

• storing a set of pointers for each queue pair in a queue pair context memory;
• utilizing said set of pointers to control the transmit queue for receiving, processing, and sending messages;
• identifying an error for a queue pair;
• and
• storing in said queue pair context memory for said queue pair a limit pointer enable bit and a limit pointer to identify a last request for processing after said error.