公开(公告)号：CA2548085C

公开(公告)日：2014-04-29

申请号：CA2548085

申请日：2004-12-08

Applicant: IBM

Inventor： BIRAN GIORA ,  MACHULSKY ZORIK ,  MAKHERVAKS VADIM ,  SHALEV LEAH

IPC: H04L1/22 ,  H03M13/09 ,  H04L29/08

Abstract: A network interface controller implementation that performs direct data placement to memory where all segments of a particular connection are aligned, i.e. cuts-through without accessing reassembly buffers (i.e., a "Fast" connection type), or if all segments are non~aligned moves data through reassembly buffers (i.e., a "Slow" connection type). The type of connection can change from Fast to Slow and back. The implementation preferably conducts CRC validation for a majority of inbound DDP segments in the Fast connection before sending a TCP acknowledgement confirming segment reception. The method of computing a CRC value according to the present invention assumes that each TCP segment starts with an aligned DDP segment and that the first two bytes of a TCP payload is an MPA length field of an MPA frame.

公开(公告)号：CA2548085A1

公开(公告)日：2005-07-07

申请号：CA2548085

申请日：2004-12-08

Applicant: IBM

Inventor： SHALEV LEAH ,  MAKHERVAKS VADIM ,  MACHULSKY ZORIK ,  BIRAN GIORA

IPC: H04L1/22 ,  H04L29/08

Abstract: A network interface controller implementation that performs direct data placement to memory where all segments of a particular connection are aligne d, i.e. cuts-through without accessing reassembly buffers (i.e., a "Fast" connection type), or if all segments are non~aligned moves data through reassembly buffers (i.e., a "Slow" connection type). The type of connection can change from Fast to Slow and back. The implementation preferably conduct s CRC validation for a majority of inbound DDP segments in the Fast connection before sending a TCP acknowledgement confirming segment reception. The metho d of computing a CRC value according to the present invention assumes that eac h TCP segment starts with an aligned DDP segment and that the first two bytes of a TCP payload is an MPA length field of an MPA frame.