International Business Machines Corporation

Sandisk Technologies Inc.

Brocade Communications Systems, Inc.

Mark William Branstad

Gary Scott Delp

Jonathan W Byrn

Albert Alfonse Slane

Philip Lynn Leichty

Kevin Gerard Plotz

Gary Paul McClannahan

Lee Anton Sendelbach

Todd Edwin Leonard

Jeffrey James Lynch

John Emery Nordman

John Handley Shaffer

Fadi-Christian E Safi

Martin Aureliano Hassner

Martin Lueker-Boden

Brad L Brech

Brian Andrew Schuelke

Venkatesh Nagapudi

Lunkai Zhang

Rafael M Montalvo

Yash V Bansal

Phillip L Leichty

Gustavo Lau

Gary Mcclannahan

Yash Bansal

Wear levelling techniques based on use of a Galois field for the logical to physical translation of data addresses for a non-volatile memory, such as an MRAM-based memory, are presented. This not only provides a wear levelling technique to extend memory life, but also adds an additional layer of security to the stored memory data. More specifically, the following presents embodiments for secure wear levelling based on a Galois field having an order based on the size of the memory. To further improve security, a randomly generated rotation of the logically address based on the Galois field can also be used.

Secure wear levelling of non-volatile memory based on Galois field circuit

A data storage device has a controller, a decryption engine, and a memory storing encrypted data. Instead of using the decryption engine to generate a tweak value needed to decrypt the encrypted data, the tweak value is generated by the controller while the controller is waiting for the encrypted data to be read from the memory. This hides the latency to compute the tweak value in the latency to read the encrypted data from the memory.

Data storage device and method for hiding tweak generation latency

A converged network adapter in sleep mode can allow a management entity to access and alter configuration of the network adapter over the network. Configuration data such as configuration parameters, firmware, and other data related to the network adapter can be stored in a memory, which can be coupled to a portion of the adapter that receives power during sleep mode. The management entity can send configuration messages to the adapter, which messages can include commands or instructions to read or write contents of the memory. The messages can include values of the configuration parameters to be altered, firmware code, etc. The management entity can also send configuration messages to a baseboard management controller (BMC) coupled to the adapter for message validation. The adapter and the BMC can send results of memory operations back to the management entity in response messages.

Systems and methods for reconfiguring a network adapter in sleep mode

A method and apparatus are provided for implementing communications in a communications network. The apparatus for implementing communications includes a system interface to the communications network. A scheduler schedules enqueued cells and enqueued frames to be transmitted. A segmenter segments frames and cells in into cells or frames applied to a media adaptation block for transmission in a selected one of multiple modes.

Communications adapter for implementing communications in a network and providing multiple modes of communications

A circuit arrangement and method of initializing an electronic device dynamically test a non-volatile memory prior to retrieving initialization program code to select an operational access time at which the initialization program code can be reliably retrieved from the non-volatile memory. Specifically, at least one test access is performed with the non-volatile memory to determine a satisfactory access time at which the non-volatile memory correctly processes the test access. Thereafter, initialization program code is retrieved from the non-volatile memory using an operational access time selected based upon the determined satisfactory access time. As such, through judicious selection of an appropriate operational access time, non-volatile memory devices having differing performance capabilities can be accessed in an optimal manner using the same memory control logic design, and without the need for specific customization or program code modifications.

Electronic device initialization with dynamic selection of access time for non-volatile memory

A method and Gigabit Ethernet communications adapter are provided for implementing communications in a communications network. A transmission queue is defined of data to be transmitted. A transmission rate is set for the transmission queue. Data to be transmitted are enqueued on the transmission queue. The transmission queue can be subdivided into multiple priority queues, for example, using time wheels, and a transmission rate is set for each transmission queue.

Communications methods and gigabit ethernet communications adapter providing quality of service and receiver connection speed differentiation

A network buffer memory is divided into pools of locations including a plurality of tinygram contiguous sections and a plurality of jumbogram contiguous sections. The tinygram contiguous sections available for storage of packets are listed in a list of tinygram pointers. The jumbogram contiguous sections available for storage of packets are also listed in a list of jumbogram pointers. A threshold for distinguishing the packets as tinygrams and jumbograms is programmed. As packets are received, they are measured against the threshold. Responsive to detection of an end of packet condition prior to reaching the threshold, storing the packet in a tinygram contiguous section. Otherwise, the packet is stored in a jumbogram contiguous section. Availability of sections is determined by query to the FIFO lists of pointers.

System and method for management a communications buffer

A method for setting a locking frequency operating range of the phase locked loop (PLL) circuit and a phase locked loop (PLL) circuit are provided with range select logic for detecting an unknown reference clock frequency and for setting a locking frequency operating range of the phase locked loop. First a bypass mode for the phase locked loop (PLL) circuit is set. An unknown reference clock frequency is applied to a first counter. A known oscillator clock frequency is applied to a second counter. The first and second counters are reset and a timeout value of the second counter is identified. A first counter count value is compared with precalculated constant values. A set of range bits are latched responsive to said compared values. Two consecutive sets of latched range bits are compared and the steps repeated until a match of two consecutive sets of latched range bits is identified. The matching latched range bits are applied to a programmable range select input of the phase locked loop (PLL) circuit.

Phase locked loop circuit having automatic range setting logic

A method and apparatus for implementing virtual memory having multiple selected page sizes are provided. A virtual address includes a map index and a frame offset. A selector mechanism receives the virtual address frame offset and generates an offset and index. A frame map table indexes the virtual address map index and the selector generated index and generates a base address. The frame map table generated base address and the selector generated offset are combined to provide a physical address.

Method and apparatus for implementing virtual memory having multiple

Method and apparatus are provided for transmitting a stream of multimedia digital data over a distribution communications network. A multimedia stream server segments the multimedia digital data stream into data blocks on a first boundary and a second boundary. The first boundary is a set number of transport system data packets and the second boundary is a transport system data packet including a timestamp. A scheduler schedules the segmented data blocks for transmission. The multimedia stream server decodes the segmented data blocks to locate the timestamps and matches the transmission of the located timestamp data block with a time value indicated by the timestamp. The set number of transport system data packets can be determined at connection setup and is not a predetermined value for all sessions. At the receiver, batch processing of received multimedia data can be provided.

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Rochester, MN, United States of America

Mark William Branstad