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pcie I/O device sharing method and device and interconnection system

A technology for interconnecting systems and equipment, applied in the fields of instruments, electrical digital data processing, etc., can solve problems such as difficulty in determining the size of the BAR

Active Publication Date: 2018-10-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Embodiments of the present invention provide a PCIe I / O device sharing method, a PCIe I / O device sharing device, and a PCIe interconnection system to solve the problem that it is difficult to determine the size of a BAR

Method used

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  • pcie I/O device sharing method and device and interconnection system

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Embodiment Construction

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] figure 1 It is a flowchart of an embodiment of the PCIe I / O device sharing method of the present invention. Such as figure 1 The shown method comprises the steps of:

[0031] Step 101, determine the shared PCIe I / O device in the PCIe interconnection system.

[0032] Determining the shared PCIe I / O device by the working node or the mana...

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Abstract

Embodiments of the present invention provide a PCIe I / O device sharing method and a device and interconnection system. The method includes: determining the shared PCIe I / O device in the PCIe interconnection system; establishing the relationship between the address of the CSR of the shared PCIe I / O device and the address used to process the CSR in the working node domain through the BAR on the working node side of the NTB The first mapping relationship among them; establish the address in the management node domain for receiving shared PCIe I / O device MSI-X interrupts and the address in the working node domain for processing MSI-X interrupts through the A-LUT fragmentation on the management node side of the NTB The second mapping relationship between addresses. Use an A-LUT slice to complete the mapping of a shared PCIe I / O device, so that the size and quantity of the A-LUT slice can be determined according to the number of shareable PCIe I / O devices, and the size of the BAR can be determined.

Description

technical field [0001] The invention relates to the field, in particular to a PCIe I / O device sharing method and a device and interconnection system. Background technique [0002] With the development of Ethernet interconnection and InfiniBand technology, an interconnection system based on PCIe architecture (PCIeFabric) composed of high-speed peripheral component interconnection (PCIe, Peripheral Component Interconnect Express) has emerged. The interconnection system of PCIe Fabric, also known as PCIe interconnection system, usually includes a management node and N working nodes, each node belongs to an independent domain, and non-transparent bridges (NTB, Non-Transparent Bridge) are used between different domains. ) to connect and implement address isolation. The high-speed peripheral component interconnection input / output (PCIe I / O) device shared by each working node is usually set in the domain where the management node is located. [0003] In a system based on the PCIe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/20
CPCG06F2213/0026G06F13/24G06F13/4282
Inventor 李峰方帆
Owner HUAWEI TECH CO LTD
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