Patents by Inventor Debendra Das Sharma
Debendra Das Sharma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20140281067Abstract: A system and method comprising, in response to a first component and a second component undergoing a link training and equalization procedure, a second component is to communicate a first set of data to the first component via a first transmission logic along at least one channel of a communications link. The first component and the second component are link partners. The first set of data further includes a full swing value and a low frequency value which are stored in a first storage unit of the first component. The first component is to store a first computed set of coefficients from the full swing value and the low frequency value. The second component is to apply the first computed set of coefficients to the first transmission logic of the second component.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Inventors: DEBENDRA DAS SHARMA, KANAKA LAKSHIMI SIVA PRASAD GADEY NAGA VENKATA, HARSHIT KISHOR POLADIA
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Patent number: 8806068Abstract: A method and apparatus for enhancing/extending a serial point-to-point interconnect architecture, such as Peripheral Component Interconnect Express (PCIe) is herein described. Temporal and locality caching hints and prefetching hints are provided to improve system wide caching and prefetching. Message codes for atomic operations to arbitrate ownership between system devices/resources are included to allow efficient access/ownership of shared data. Loose transaction ordering provided for while maintaining corresponding transaction priority to memory locations to ensure data integrity and efficient memory access. Active power sub-states and setting thereof is included to allow for more efficient power management. And, caching of device local memory in a host address space, as well as caching of system memory in a device local memory address space is provided for to improve bandwidth and latency for memory accesses.Type: GrantFiled: December 6, 2012Date of Patent: August 12, 2014Assignee: Intel CorporationInventors: Jasmin Ajanovic, Mahesh Wagh, Prashant Sethi, Debendra Das Sharma, David J. Harriman, Mark B. Rosenbluth, Ajay V. Bhatt, Peter Barry, Scott Dion Rodgers, Anil Vasudevan, Sridhar Muthrasanallur, James Akiyama, Robert G. Blankenship, Ohad Falik, Avi Mendelson, Ilan Pardo, Eran Tamari, Eliezer Weissmann, Doron Shamia
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Patent number: 8793404Abstract: A method and apparatus for enhancing/extending a serial point-to-point interconnect architecture, such as Peripheral Component Interconnect Express (PCIe) is herein described. Temporal and locality caching hints and prefetching hints are provided to improve system wide caching and prefetching. Message codes for atomic operations to arbitrate ownership between system devices/resources are included to allow efficient access/ownership of shared data. Loose transaction ordering provided for while maintaining corresponding transaction priority to memory locations to ensure data integrity and efficient memory access. Active power sub-states and setting thereof is included to allow for more efficient power management. And, caching of device local memory in a host address space, as well as caching of system memory in a device local memory address space is provided for to improve bandwidth and latency for memory accesses.Type: GrantFiled: June 11, 2012Date of Patent: July 29, 2014Assignee: Intel CorporationInventors: Jasmin Ajanovic, Mahesh Wagh, Prashant Sethi, Debendra Das Sharma, David Harriman, Mark Rosenbluth, Ajay Bhatt, Peter Barry, Scott Dion Rodgers, Anil Vasudevan, Sridhar Muthrasanallur, James Akiyama, Robert Blankenship, Ohad Falik, Abraham Mendelson, Ilan Pardo, Eran Tamari, Eliezer Weissmann, Doron Shamia
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Patent number: 8782461Abstract: A method and system of error recovery of a device attached to a platform without requiring a system reset. In one embodiment of the invention, a platform detects an error(s) of an attached device and shuts down the communication link with the attached device. The platform corrects the error(s) and automatically re-trains the communication link with the attached device. In this way, no reset of the platform is required to correct the detected error(s) in one embodiment of the invention.Type: GrantFiled: September 24, 2010Date of Patent: July 15, 2014Assignee: Intel CorporationInventors: Sridhar Muthrasanallur, Debendra Das Sharma, Jayakrishna P. S, Eric R. Wehage
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Patent number: 8782318Abstract: Methods and apparatus relating to increase Input Output Hubs in constrained link based multi-processor systems are described. In one embodiment, a first input output hub (IOH) and a second IOH are coupled a link interconnect and a plurality of processors, coupled to the first and second IOHs include pre-allocated resources for a single IOH. Other embodiments are also disclosed and claimed.Type: GrantFiled: March 2, 2011Date of Patent: July 15, 2014Assignee: Intel CorporationInventors: Debendra Das Sharma, Chandra P. Joshi, Gurushankar Rajamani
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Publication number: 20140189427Abstract: A packet is identified at a port of a serial data link, and it is determined that the packet is associated with an error. Entry into an error recovery mode is initiated based on the determination that the packet is associated with the error. Entry into the error recovery mode can cause the serial data link to be forced down. In one aspect, forcing the data link down causes all subsequent inbound packets to be dropped and all pending outbound requests and completions to be aborted during the error recovery mode.Type: ApplicationFiled: May 13, 2013Publication date: July 3, 2014Inventors: Prahladachar Jayaprakash Bharadwaj, Alexander Brown, Debendra Das Sharma, Junaid Thaliyil
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Publication number: 20140176353Abstract: Method, apparatus, and systems employing dictionary-based high-bandwidth lossless compression. A pair of dictionaries having entries that are synchronized and encoded to support compression and decompression operations are implemented via logic at a compressor and decompressor. The compressor/decompressor logic operatives in a cooperative manner, including implementing the same dictionary update schemes, resulting in the data in the respective dictionaries being synchronized. The dictionaries are also configured with replaceable entries, and replacement policies are implemented based on matching bytes of data within sets of data being transferred over the link. Various schemes are disclosed for entry replacement, as well as a delayed dictionary update technique. The techniques support line-speed compression and decompression using parallel operations resulting in substantially no latency overhead.Type: ApplicationFiled: February 28, 2014Publication date: June 26, 2014Inventors: Ilan Pardo, Ido Y. Soffair, Dror Reif, Debendra Das Sharma, Akshay G. Pethe
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Patent number: 8751714Abstract: Methods and apparatus for implementing the Intel QuickPath Interconnect® (QPI) protocol over a PCIe interface. The upper layers of the QPI protocol are implemented over a physical layer of the PCIe interface via use of QPI data bit mappings onto corresponding PCIe x16, x8, and x4 lane configurations. A QPI link layer to PCIe physical layer interface is employed to abstract the QPI link, routing, and protocol layers from the underlying PCIe physical layer (and corresponding PCIe interface circuitry), enabling QPI protocol messages to be employed over PCIe hardware. Thus, QPI functionality, such as support for coherent memory transactions, may be implemented over PCIe interface circuitry.Type: GrantFiled: September 24, 2010Date of Patent: June 10, 2014Assignee: Intel CorporationInventors: Robert J. Safranek, Debendra Das Sharma, Ganapati N. Srinivasa
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Publication number: 20140112339Abstract: A physical layer (PHY) is coupled to a serial, differential link that is to include a number of lanes. The PHY includes a transmitter and a receiver to be coupled to each lane of the number of lanes. The transmitter coupled to each lane is configured to embed a clock with data to be transmitted over the lane, and the PHY periodically issues a blocking link state (BLS) request to cause an agent to enter a BLS to hold off link layer flit transmission for a duration.Type: ApplicationFiled: October 22, 2013Publication date: April 24, 2014Inventors: Robert J. Safranek, Robert G. Blankenship, Venkatraman Iyer, Jeff Willey, Robert Beers, Darren S. Jue, Arvind A. Kumar, Debendra Das Sharma, Jeffrey C. Swanson, Bahaa Fahim, Vedaraman Geetha, Aaron T. Spink, Fulvio Spagna, Rahul C. Shah, Sitaraman V. Iyer, Bill Harry Nale, Abhishek Das, Simon P. Johnson, Yuvraj S. Dhillon, Yen-Cheng Liu, Raj K. Ramanujan, Robert A. Maddox, Herbert H. Hum, Ashish Gupta
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Publication number: 20140115207Abstract: A periodic control window is embedded in a link layer data stream to be sent over a serial data link, where the control window is configured to provide physical layer information including information for use in initiating state transitions on the data link. The link layer data can be sent during a link transmitting state of the data link and the control window can interrupt the sending of flits. In one aspect, the information includes link width transition data indicating an attempt to change the number of active lanes on the link.Type: ApplicationFiled: March 27, 2013Publication date: April 24, 2014Inventors: Venkatraman Iyer, Darren S. Jue, Robert G. Blankenship, Fulvio Spagna, Debendra Das Sharma, Jeffrey C. Swanson
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Publication number: 20140095751Abstract: Methods and apparatus relating to fast deskew when exiting a low-power partial-width high speed link state are described. In one embodiment, an exit flit on active lanes and/or a wake signal/sequence on idle lanes may be transmitted at a first point in time to cause one or more idle lanes of a link to enter an active state. At a second point in time (following or otherwise subsequent to the first point in time), training sequences are transmitted over the one or more idle lanes of the link. And, the one or more idle lanes are deskewed in response to the training sequences and prior to a third point in time (following or otherwise subsequent to the second point in time). Other embodiments are also disclosed and claimed.Type: ApplicationFiled: September 29, 2012Publication date: April 3, 2014Inventors: Venkatraman Iyer, Darren S. Jue, Robert G. Blankenship, Debendra Das Sharma
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Patent number: 8665124Abstract: Method, apparatus, and systems employing dictionary-based high-bandwidth lossless compression. A pair of dictionaries having entries that are synchronized and encoded to support compression and decompression operations are implemented via logic at a compressor and decompressor. The compressor/decompressor logic operatives in a cooperative manner, including implementing the same dictionary update schemes, resulting in the data in the respective dictionaries being synchronized. The dictionaries are also configured with replaceable entries, and replacement policies are implemented based on matching bytes of data within sets of data being transferred over the link. Various schemes are disclosed for entry replacement, as well as a delayed dictionary update technique. The techniques support line-speed compression and decompression using parallel operations resulting in substantially no latency overhead.Type: GrantFiled: October 1, 2011Date of Patent: March 4, 2014Assignee: Intel CorporationInventors: Ilan Pardo, Ido Y. Soffair, Dror Reif, Debendra Das Sharma, Akshay G. Pethe
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Publication number: 20140006677Abstract: Methods and apparatus for embedding a control channel in a high speed serial interconnect having multiple data lanes. Operational aspects of the interconnect are controlled via use of control channel data that is sent over one or more of the data lanes on a periodic basis. A link state cycle is employed that includes a link control period during which control information is transferred over the interconnect and a link control interval between link control periods during which other links states are implemented, such as for transferring data or operating the link in a low power state. The link state cycles at transmitter and receiver ports are synchronized to account for link transmit latencies, and the timing of link state cycles corresponding to a bidirectional exchange of link control information may be configured to support an overlapping implementation or to facilitate a request/response link control protocol.Type: ApplicationFiled: June 29, 2012Publication date: January 2, 2014Inventors: Venkatraman Iyer, Debendra Das Sharma, Robert G. Blankenship, Darren S. Jue
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Patent number: 8555101Abstract: A method and apparatus for enhancing/extending a serial point-to-point interconnect architecture, such as Peripheral Component Interconnect Express (PCIe) is herein described. Temporal and locality caching hints and prefetching hints are provided to improve system wide caching and prefetching. Message codes for atomic operations to arbitrate ownership between system devices/resources are included to allow efficient access/ownership of shared data. Loose transaction ordering provided for while maintaining corresponding transaction priority to memory locations to ensure data integrity and efficient memory access. Active power sub-states and setting thereof is included to allow for more efficient power management. And, caching of device local memory in a host address space, as well as caching of system memory in a device local memory address space is provided for to improve bandwidth and latency for memory accesses.Type: GrantFiled: March 11, 2011Date of Patent: October 8, 2013Assignee: Intel CorporationInventors: Jasmin Ajanovic, Mahesh Wagh, Prashant Sethi, Debendra Das Sharma, David Harriman, Mark Rosenbluth, Ajay Bhatt, Peter Barry, Scott Dion Rodgers, Anil Vasudevan, Sridhar Muthrasanallur, James Akiyama, Robert Blankenship, Ohad Falik, Abraham Mendelson, Ilan Pardo, Eran Tamari, Eliezer Weissmann, Doron Shamia
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Patent number: 8549183Abstract: A method and apparatus for enhancing/extending a serial point-to-point interconnect architecture, such as Peripheral Component Interconnect Express (PCIe) is herein described. Temporal and locality caching hints and prefetching hints are provided to improve system wide caching and prefetching. Message codes for atomic operations to arbitrate ownership between system devices/resources are included to allow efficient access/ownership of shared data. Loose transaction ordering provided for while maintaining corresponding transaction priority to memory locations to ensure data integrity and efficient memory access. Active power sub-states and setting thereof is included to allow for more efficient power management. And, caching of device local memory in a host address space, as well as caching of system memory in a device local memory address space is provided for to improve bandwidth and latency for memory accesses.Type: GrantFiled: September 16, 2010Date of Patent: October 1, 2013Assignee: Intel CorporationInventors: Jasmin Ajanovic, Mahesh Wagh, Prashant Sethi, Debendra Das Sharma, David Harriman, Mark Rosenbluth, Ajay Bhatt, Peter Barry, Scott Dion Rodgers, Anil Vasudevan, Sridhar Muthrasanallur, James Akiyama, Robert Blankenship, Ohad Falik, Abraham Mendelson, Ilan Pardo, Eran Tamari, Eliezer Weissmann, Doron Shamia
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Publication number: 20130205055Abstract: Method, apparatus, and systems employing novel dictionary entry replacement schemes for dictionary-based high-bandwidth lossless compression. A pair of dictionaries having entries that are synchronized and encoded to support compression and decompression operations are implemented via logic at a compressor and decompressor. The compressor/decompressor logic operatives in a cooperative manner, including implementing the same dictionary update schemes, resulting in the data in the respective dictionaries being synchronized. The dictionaries are also configured with replaceable entries, and replacement policies are implemented based on matching bytes of data within sets of data being transferred over the link. Various schemes are disclosed for entry replacement, as well as a delayed dictionary update technique. The techniques support line-speed compression and decompression using parallel operations resulting in substantially no latency overhead.Type: ApplicationFiled: October 1, 2011Publication date: August 8, 2013Inventors: Ilan Pardo, Ido Y. Soffair, Dror Reif, Debendra Das Sharma, Akshay G. Pethe
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Patent number: 8473642Abstract: A method and apparatus for enhancing/extending a serial point-to-point interconnect architecture, such as Peripheral Component Interconnect Express (PCIe) is herein described. Temporal and locality caching hints and prefetching hints are provided to improve system wide caching and prefetching. Message codes for atomic operations to arbitrate ownership between system devices/resources are included to allow efficient access/ownership of shared data. Loose transaction ordering provided for while maintaining corresponding transaction priority to memory locations to ensure data integrity and efficient memory access. Active power sub-states and setting thereof is included to allow for more efficient power management. And, caching of device local memory in a host address space, as well as caching of system memory in a device local memory address space is provided for to improve bandwidth and latency for memory accesses.Type: GrantFiled: August 4, 2011Date of Patent: June 25, 2013Assignee: Intel CorporationInventors: Jasmin Ajanovic, Mahesh Wagh, Prashant Sethi, Debendra Das Sharma, David Harriman, Mark Rosenbluth, Ajay Bhatt, Peter Barry, Scott Dion Rodgers, Anil Vasudevan, Sridhar Muthrasanallur, James Akiyama, Robert Blankenship, Ohad Falik, Abraham Mendelson, Ilan Pardo, Eran Tamari, Eliezer Weissmann, Doron Shamia
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Publication number: 20130132622Abstract: A method and apparatus forenhancing/extending a serial point-to-point interconnect architecture, such as Peripheral Component Interconnect Express (PCIe) is herein described. Temporal and locality caching hints and prefetching hints are provided to improve system wide caching and prefetching. Message codes for atomic operations to arbitrate ownership between system devices/resources are included to allow efficient access/ownership of shared data. Loose transaction ordering provided for while maintaining corresponding transaction priority to memory locations to ensure data integrity and efficient memory access. Active power sub-states and setting thereof is included to allow for more efficient power management. And, caching of device local memory in a host address space, as well as caching of system memory in a device local memory address space is provided for to improve bandwidth and latency for memory accesses.Type: ApplicationFiled: December 13, 2012Publication date: May 23, 2013Inventors: Jasmin Ajanovic, Mahesh Wagh, Prashant Sethi, Debendra Das Sharma, David J. Harriman, Mark B. Rosenbluth, Ajay V. Bhatt, Peter Barry, Scott Dion Rodgers, Anil Vasudevan, Sridhar Muthrasanallur, James Akiyama, Robert G. Blankenship, Ohad Falik, Avi Mendelson, Ilan Pardo, Eran Tamari, Eliezer Weissmann, Doron Shamia
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Publication number: 20130132683Abstract: A method and apparatus forenhancing/extending a serial point-to-point interconnect architecture, such as Peripheral Component Interconnect Express (PCIe) is herein described. Temporal and locality caching hints and prefetching hints are provided to improve system wide caching and prefetching. Message codes for atomic operations to arbitrate ownership between system devices/resources are included to allow efficient access/ownership of shared data. Loose transaction ordering provided for while maintaining corresponding transaction priority to memory locations to ensure data integrity and efficient memory access. Active power sub-states and setting thereof is included to allow for more efficient power management. And, caching of device local memory in a host address space, as well as caching of system memory in a device local memory address space is provided for to improve bandwidth and latency for memory accesses.Type: ApplicationFiled: December 13, 2012Publication date: May 23, 2013Inventors: Jasmin Ajanovic, Mahesh Wagh, Prashant Sethi, Debendra Das Sharma, David J. Harriman, Mark B. Rosenbluth, Ajay V. Bhatt, Peter Barry, Scott Dion Rodgers, Anil Vasudevan, Sridhar Muthrasanallur, James Akiyama, Robert G. Blankenship, Ohad Falik, Avi Mendelson, Ilan Pardo, Eran Tamari, Eliezer Weissmann, Doron Shamia
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Publication number: 20130132636Abstract: A method and apparatus for enhancing/extending a serial point-to-point interconnect architecture, such as Peripheral Component Interconnect Express (PCIe) is herein described. Temporal and locality caching hints and prefetching hints are provided to improve system wide caching and prefetching. Message codes for atomic operations to arbitrate ownership between system devices/resources are included to allow efficient access/ownership of shared data. Loose transaction ordering provided for while maintaining corresponding transaction priority to memory locations to ensure data integrity and efficient memory access. Active power sub-states and setting thereof is included to allow for more efficient power management. And, caching of device local memory in a host address space, as well as caching of system memory in a device local memory address space is provided for to improve bandwidth and latency for memory accesses.Type: ApplicationFiled: November 30, 2012Publication date: May 23, 2013Inventors: Jasmin Ajanovic, Mahesh Wagh, Prashant Sethi, Debendra Das Sharma, David J. Harriman, Mark B. Rosenbluth, Ajay V. Bhatt, Peter Barry, Scott Dion Rodgers, Anil Vasudevan, Sridhar Muthrasanallur, James Akiyama, Robert G. Blankenship, Ohad Falik, Avi Mendelson, Ilan Pardo, Eran Tamari, Eliezer Weissmann, Doron Shamia