公开(公告)号：US20060259644A1

公开(公告)日：2006-11-16

申请号：US11487265

申请日：2006-07-14

Applicant: William Boyd ,  Jean Calvignac ,  Chih-Jen Chang ,  Douglas Joseph ,  Renato Recio

Inventor： William Boyd ,  Jean Calvignac ,  Chih-Jen Chang ,  Douglas Joseph ,  Renato Recio

IPC: G06F15/16

CPC classification number: H04L69/16 ,  H04L69/12 ,  H04L69/161

Abstract: A mechanism for offloading the management of receive queues in a split (e.g. split socket, split iSCSI, split DAFS) stack environment, including efficient queue flow control and TCP/IP retransmission support. An Upper Layer Protocol (ULP) creates receive work queues and completion queues that are utilized by an Internet Protocol Suite Offload Engine (IPSOE) and the ULP to transfer information and carry out send operations. As consumers initiate receive operations, receive work queue entries (RWQEs) are created by the ULP and written to the receive work queue (RWQ). The ISPOE is notified of a new entry to the RWQ and it subsequently reads this entry that contains pointers to the data that is to be received. After the data is received, the IPSOE creates a completion queue entry (CQE) that is written into the completion queue (CQ). After the CQE is written, the ULP subsequently processes the entry and removes it from the CQE, freeing up a space in both the RWQ and CQ. The number of entries available in the RWQ are monitored by the ULP so that it does not overwrite any valid entries. Likewise, the IPSOE monitors the number of entries available in the CQ, so as not overwrite the CQ.

Abstract translation: 一种用于卸载分裂（例如，分裂式插座，拆分式iSCSI，拆分式DAFS）堆栈环境中接收队列管理的机制，包括有效的队列流控制和TCP / IP重传支持。 上层协议（ULP）创建互联网协议套件卸载引擎（IPSOE）和ULP利用的接收工作队列和完成队列，以传输信息并执行发送操作。 当消费者开始接收操作时，接收工作队列条目（RWQE）由ULP创建并写入接收工作队列（RWQ）。 通知ISPOE对RWQ的新条目，并随后读取包含要接收的数据的指针的该条目。 接收到数据后，IPSOE创建写入完成队列（CQ）的完成队列条目（CQE）。 在编写CQE之后，ULP随后处理该条目并将其从CQE中移除，释放了RWQ和CQ两者中的空间。 RWQ中可用的条目数由ULP监视，以便它不会覆盖任何有效的条目。 同样，IPSOE监视CQ中可用条目的数量，以免覆盖CQ。