A system implementation management method of pcie NTB

Abstract

The present invention provides a system implementation management method of PCIe NTB, which includes setting a first NT module in a first PCIe bus controller; setting a second NT module in a second PCIe bus controller; As a device attached to the first uplink port of the second PCIe bus controller; complete address conversion and ID conversion through the first NT module and the second NT module, so as to realize the first PCIe bus controller and the first NTB interconnection between two PCIe bus controllers. The invention realizes the support of the NTB function on the basis of the general architecture of the PCIe Switch, satisfies the NTB application of different scenarios, improves the flexibility of port configuration, and reduces the cost of chain construction.

Description

technical field [0001] The invention belongs to the field of bus design, in particular to a system implementation management method of PCIe NTB. Background technique [0002] PCIe (PCI Express) is a high-speed serial computer expansion bus standard. PCIe is a tree topology such as figure 1 A typical topology diagram of PCIe is shown. There can only be one host in the entire topology, and the Host can access all devices in the topology. [0003] In modern communication and storage scenarios, scenarios where multiple hosts share devices are usually required, such as figure 2 As shown, both Host1 and Host2 need to access all EP devices (Endpoint, PCIe endpoint devices) under PCIe Switch1 and PCIe Switch2. For example, Host1 can access EP10, EP11, EP12, EP13, and Host1 also needs to access EP20, EP21, EP22, EP23 equipment. However, since multiple hosts cannot coexist in the same PCIe topology, they must be divided into multiple PCIe topology domains, and each PCIe topology...

AI Technical Summary

Problems solved by technology

[0006] (1) Each NT port needs to contain a DP port, and the DP port must include two EPs; when each PCIe port must support the NT port, resource overhead is increased

[0007] (2) When a limited number of ports support NT ports, the usage scenarios are limited

Only limited ports support NTB, other ports cannot support NTB function

Because EP can only be bound to the corresponding DP port one by one, lack of flexibility

[0008] (3) It is necessary to specify that the NT ports on both sides must be DP ports, which brings additional restrictions on the function of link establishment using the Crosslink feature

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