Flash memory medium access method and controller
A controller and medium technology, applied in the storage field, can solve problems such as low efficiency of operation instruction execution, waste of waiting time, etc.
Active Publication Date: 2018-06-12
HUAWEI TECH CO LTD
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Problems solved by technology
Due to the difference in the execution time of different basic instructions, the controller will waste a lot of waiting time to wait for the current instruction to be executed by the flash medium before sending a new instruction, resulting in low efficiency of operation instruction execution
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[0061] It should be noted that the terms used in the embodiments of the present invention are for the purpose of describing specific embodiments, not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items. In addition, the terms "first", "second", "third" and "fourth" in the description and claims of the present invention and the above drawings are used to distinguish different objects, rather than to describe specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comp...
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Disclosed in the present application is a flash memory medium access method, comprising: according to a pre-defined rule, a controller selects a target function queue from amongst N function queues; the target function queue is a non-empty queue, a flash memory medium in which a die associated with the target function queue is located is in an idle state, and N is an integer greater than 1; extracting a basic command from the target function queue; on the basis of preset queue mapping information, determining the die associated with the target function queue; the controller is connected to atleast one flash memory medium, the at least one flash memory medium comprising N die, the queue mapping information indicating that the N function queues are mapped on a one-to-one basis with the N die; on the basis of a preset signal generating rule, generating a time sequence signal corresponding to the basic command, and sending the time sequence signal to the flash memory medium in which the associated dye is located. The present invention can improve the command execution efficiency of the flash memory medium and the compatibility of the controller with different flash memory media.
Description
technical field [0001] The invention relates to the storage field, in particular to a method for accessing a flash memory medium and a controller. Background technique [0002] A solid state drive (Solid State Device, SSD) is more and more widely used because of its advantages such as fast access speed and good shock resistance. The main storage medium of solid-state hard disk is flash memory medium, such as Nand Flash, a NandFlash is a device (device), a device can be composed of one or more chips (Die), a chip can be divided into multiple flash memory chips (Plane), A flash memory slice can be divided into several blocks (Block), and a block is divided into many pages (Page). The basic unit of NandFlash's data read and write operations is the page, and the data is erased in units of blocks. [0003] NandFlash produced by different Nand Flash manufacturers has different modes, speeds, commands and protocols, and even different processes and batches of Nand Flash from the ...
Claims
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IPC IPC(8): G06F3/06
CPCG06F3/0604G06F3/0659G06F3/0679G06F13/1689G06F13/1694G06F12/0246G06F12/063G06F13/16G06F13/1668G06F13/4234G06F2212/2022
Inventor 李涛周冠锋李生
Owner HUAWEI TECH CO LTD