Password card drive implementation method and system supporting multiple devices

Abstract

The invention provides a password card driver implementation method and system supporting multiple devices, and the method comprises the steps: creating character devices and device nodes in a moduleinit module of a Linux system driver, then registering a pci-e device driver in the system by using a pciregister driver, and registering a pci device structural body pcidev in the system by using the pci-e device driver; initializing at least one pci-e password card one by one by a detection function probe driven by the pci-e equipment, and applying for a corresponding equipment resource structural body for each pci-e password card; for each pci-e password card, respectively acquiring I / O resources and DMA resources, and storing the I / O resources and the DMA resources in corresponding equipment resource structural bodies; a function list is used for linking each equipment resource structure body to a preset global linked list (struct list acceltable), and a function list is used for linking each equipment resource structure body to a preset global linked list (struct list acceltable); and setting each equipment resource structure body as private data of the pci equipment structure body pcidev. According to the invention, all the pci-e password cards occupy one device node of the system, so that system resources are saved.

Description

technical field [0001] The present invention relates to the field of computers, in particular to a method and system for implementing a cipher card driver supporting multiple devices. Background technique [0002] In the Linux system, devices are divided into three basic types: character devices, block devices and network devices. The pci-e password card is generally a character device, and the character device generally implements system calls such as open, close, write, and read. The character device system call implements the functions required by the user, and the application layer user completes the operation of the password card by calling the character device system call. Usually, a pci-e password card requires a device to be associated with a character device, a corresponding device file needs to be created, and a device number needs to be applied. One card can virtualize 128 pci-e devices), which will occupy multiple linux system device numbers, occupy too many sy...

AI Technical Summary

Problems solved by technology

Usually a pci-e password card requires the device to be associated with a character device, a corresponding device file needs to be created, and a device number needs to be applied for at the same time. One card can virtualize 128 pci-e devices) will occupy multiple linux system device numbers, occupying too many system resources, resulting in waste of resources

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