公开(公告)号：US10482050B2

公开(公告)日：2019-11-19

申请号：US15722783

申请日：2017-10-02

Applicant: QUALCOMM Incorporated

Inventor： Neven Klacar ,  Yan He ,  Murali Krishna

IPC: G06F13/40 ,  G06F13/42

Abstract: Link role determination in a dual-mode Peripheral Component Interconnect express (PCIe) device is disclosed. In this regard, determining a link role for a dual-mode PCIe device involves configuring the dual-mode PCIe device to operate in a root complex (RC) mode or an endpoint mode. The dual-mode PCIe device first performs a configuration and initiation sequence on a wire-based PCIe link in the RC mode. If the configuration and initiation sequence on the wire-based PCIe link is unsuccessful, then the dual-mode PCIe device invokes a random delay and switches to the endpoint mode at expiration of the random delay. By determining a link role of the dual-mode PCIe device based on the configuration and initiation sequence, it is possible to configure dynamically the dual-mode PCIe device to operate in the RC mode or the endpoint mode, thus allowing flexible configuration of the dual-mode PCIe device based on various application scenarios.

公开(公告)号：US20180129623A1

公开(公告)日：2018-05-10

申请号：US15722783

申请日：2017-10-02

Applicant: QUALCOMM Incorporated

Inventor： Neven Klacar ,  Yan He ,  Murali Krishna

IPC: G06F13/40 ,  G06F13/42

CPC classification number: G06F13/4027 ,  G06F13/385 ,  G06F13/4282 ,  G06F2213/0026

Abstract: Link role determination in a dual-mode Peripheral Component Interconnect express (PCIe) device is disclosed. In this regard, determining a link role for a dual-mode PCIe device involves configuring the dual-mode PCIe device to operate in a root complex (RC) mode or an endpoint mode. The dual-mode PCIe device first performs a configuration and initiation sequence on a wire-based PCIe link in the RC mode. If the configuration and initiation sequence on the wire-based PCIe link is unsuccessful, then the dual-mode PCIe device invokes a random delay and switches to the endpoint mode at expiration of the random delay. By determining a link role of the dual-mode PCIe device based on the configuration and initiation sequence, it is possible to configure dynamically the dual-mode PCIe device to operate in the RC mode or the endpoint mode, thus allowing flexible configuration of the dual-mode PCIe device based on various application scenarios.