MULTI-HOST POWER CONTROLLER (MHPC) OF A FLASH-MEMORY-BASED STORAGE DEVICE

摘要

A multi-host power controller (MHPC) of a flash-memory-based storage device is disclosed. In one aspect, the MHPC receives power mode change requests from each of multiple input/output (I/O) clients. The MHPC extracts and stores a “vote,” or a requested power mode, from the power mode change requests, and then applies a voting logic to the stored votes to determine whether to transition the flash-memory-based storage device between power modes. If the flash-memory-based storage device is not currently operating in the power mode determined by the MHPC, the MHPC is configured to issue a power mode change command to the flash-memory-based storage device to transition to the determined power mode. In this manner, the MHPC is able to control the power mode of the flash-memory-based storage device while receiving direct power mode change requests from multiple I/O clients.

主权项

1. A multi-host power controller (MHPC) of a multi-host controller, the MHPC communicatively coupled to a plurality of input/output (I/O) clients and to a flash-memory-based storage device;
the MHPC comprising an MHPC request status register configured to indicate a last requested power mode for each I/O client of the plurality of I/O clients; and the MHPC configured to:
receive, via a transfer request (TR) filter circuit of the multi-host controller, a power mode change request from an I/O client of the plurality of I/O clients;extract a power mode vote from the power mode change request, the power mode vote indicative of a power mode requested by the I/O client;store the power mode vote in the MHPC request status register of the MHPC;apply a voting logic to the MHPC request status register to determine whether a power mode of the flash-memory-based storage device should be changed; andresponsive to determining that the power mode should be changed, issue a power mode change command from the MHPC to the flash-memory-based storage device to change the power mode.