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Method for an association between the PCI function number and the associated logical function on the device

IP.com Disclosure Number: IPCOM000011948D
Publication Date: 2003-Mar-26
Document File: 3 page(s) / 90K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for an association between the peripheral component interface (PCI) function number and the associated logical function on the device. Benefits include improved flexibility, improved functionality, and improved ease of implementation by avoiding board redesign.

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Method for an association between the PCI function number and the associated logical function on the device 

Disclosed is a method for an association between the peripheral component interface (PCI) function number and the associated logical function on the device.

Benefits include improved flexibility, improved functionality, and improved ease of implementation by avoiding board redesign.

Background

              On a conventional multifunction PCI card, each function has a PCI function number. Each logical function has a physical location on the board, such as an upper port, lower port, or other location. The location is hard coded to a PCI function number. For example, PCI function 0 is always the upper port. To change the location, the board must be redesigned to make a cross between the port so that  PCI function 0 = upper port on the device= lower port on the redesigned board

              Conventionally, each board is a customer-specific layout, even if using the same device.

Description

              The disclosed method is an association between the PCI function number and the internal logical number. The PCI function number and the internal logical function are associated using a configurable block (see Figure 1 . 2 ), and internal logical function are hardly associated to physical port. This association enables compatibility with implementations of PCI-function 0 as the upper port and with implementations of PCI-function 0 as the lower port or any other location.

              Th...