Innogrit Technologies Co., Ltd.

Marvell International Limited

Marvellworld Trade Ltd.

Bo Fu

Jie Chen

Zining Wu

Xiaoming Zhu

Cheng-Yun Hsu

Wei Xu

Fei Sun

Lin Chen

Dishi Lai

Jian Wu

Qian Cheng

Jinjin He

Han Zhang

Chi-Chun Lai

ChengKuo Huang

Siu-Hung Frederick Au

Yaolong Gao

Systems and methods are provided for reading data from non-volatile storage devices and decoding the read data. A method may include obtaining a unique identifier for a storage location to be read, retrieving from a memory an adjustment to read reference voltage (Vref) associated with the unique identifier, performing a read operation on the storage location using a read reference voltage adjusted by the adjustment to Vref, decoding data read from the storage location in a decoding process and updating the adjustment to Vin the memory with decoding information generated during the decoding process.

Selecting read reference voltage using historical decoding information

Systems and methods are provided for data retrieval in garbage collection (GC) processes. A method may include obtaining column addresses based on bitmaps indicating positions of valid data units in respective pages within a plurality of blocks of a non-volatile storage device and issuing data transfer commands to the non-volatile storage device, the data transfer commands including the column addresses to identify valid data units of a page of data read into cache registers from the non-volatile storage device.

Valid data retrieval for garbage collection

A method including determining that a memory unit is available for a channel for communication between a storage controller and a non-volatile storage device, the memory unit being for temporary storage for encoded data for transmission through the channel; allocating the memory unit to that channel; and updating a memory mapping entry corresponding to the memory unit. The memory mapping entry is stored in the storage controller. Updating a memory mapping entry may be based on reading/write tasks. The memory mapping entry may indicate a cross channel status, an operation mode and an identifier of the channel. The method may include determining the channel being stuck due to memory shortage and mapping more memory units to the channel.

Systems and methods for an ECC architecture with memory mapping

Systems, apparatus and methods are provided for using a partial logical-to-physical (L2P) address translation table for multiple namespaces to perform address translation. An exemplary embodiment may provide a method comprising: receiving a request for a first logical data address (LDA) that belongs to a first namespace (NS); searching the first NS in an entry location table (ELT) for all namespaces whose L2P entries always reside in memory; determining that the first NS is not in the ELT; searching a cache of lookup directory entries of recently accessed translation data units (TDUs) for a first TDU containing a L2P entry for the first LDA; determining that there is a cache miss; retrieving the lookup directory entry for the first TDU from an in-memory lookup directory and determining that it is not valid; reserving a TDU space for the first TDU; and generating a load request for the first TDU.

Partial logical-to-physical (L2P) address translation table for multiple namespaces

Systems, apparatus and methods are provided for providing an error correction code (ECC) architecture with flexible memory mapping. An apparatus may include an error correction code (ECC) engine, a multi-channel interface for one or more non-volatile storage devices, a memory including a plurality of memory units, a storage containing a plurality of mapping entries to indicate allocation status of the plurality of memory units and a memory mapping manager. The plurality of memory units may be coupled to the ECC engine and the multi-channel interface. The memory mapping manager may be configured to control allocation of the plurality of memory units and set allocation status in the plurality of mapping entries.

Systems and methods are provided for data retrieval in garbage collection (GC) processes. A method may include sending a command with bitmaps from a processor to a non-volatile storage device interface controller to perform a read operation on multiple blocks across multiple planes. The bitmaps may indicate positions of valid data units in respective pages within the blocks. The method may further include issuing an initial batch of multi-plane read commands to read a page of data from each of the plurality of planes into cache registers, obtaining specified column addresses to selectively identify valid data units for transferring based on the bitmaps and a data unit size, issuing subsequent batches of multi-plane cache read commands followed by data transfer commands, and issuing a cache read end command followed by a last set of data transfer commands. The data transfer commands may include the specified column addresses.

Systems and methods are provided for decoding data read from non-volatile storage devices. A method that may include decoding a first codeword read from a storage location of a non-volatile storage device using a first decoder without soft information, determining that the first decoder has failed to decode the first codeword, decoding the first codeword using a second decoder without soft information, determining that the second decoder has succeeded in decoding the first codeword, generating soft information associated with the storage location using decoding information generated by the second decoder and decoding a subsequent codeword from the storage location using the soft information associated with the storage location. The second decoder may be more powerful than the first decoder.

Systems and methods for decoding codewords in a same page with historical decoding information

Systems, apparatus and methods are provided for logical-to-physical (L2P) address translation. A method may comprise receiving a request for a first logical data address (LDA), and calculating a first translation data unit (TDU) index for a first TDU. The first TDU may contain a L2P entry for the first LDA. The method may further comprise searching a cache of lookup directory entries of recently accessed TDUs using the first TDU index, determining that there is a cache miss, generating and storing an outstanding request for the lookup directory entry for the first TDU in a miss buffer, retrieving the lookup directory entry for the first TDU from an in-memory lookup directory, determining that the lookup directory entry for the first TDU is not valid, reserve a TDU space for the first TDU in a memory and generating a load request for the first TDU.

Non-volatile storage controller with partial logical-to-physical (L2P) address translation table

Systems and methods are provided for reading data from non-volatile storage devices and decoding the read data. A method may include obtaining a unique identifier for a storage location to be read, retrieving from a memory an adjustment to read reference voltage (Vref) associated with the unique identifier, performing a read operation on the storage location using a read reference voltage adjusted by the adjustment to Vref, decoding data read from the storage location in a decoding process and updating the adjustment to Vwith decoding information generated during the decoding process.

Systems and methods are provided for decoding data read from non-volatile storage devices. A method may comprise receiving a chunk of data read from a physical location of a non-volatile storage device and searching a memory for soft information associated with the physical location using a unique identifier associated with the physical location. The soft information may be generated from one or more previous decoding processes on previous data from the physical location. The method may further comprise retrieving the soft information identified by the unique identifier associated with the physical location from the memory, decoding the chunk of data with the soft information indicating reliability of bits in the chunk of data and updating the soft information with decoding information generated during the decoding.

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Cupertino, CA, United States of America

Bo Fu