公开(公告)号：US12253961B2

公开(公告)日：2025-03-18

申请号：US16728114

申请日：2019-12-27

Applicant: ADVANCED MICRO DEVICES, INC.

Inventor： James R. Magro ,  Kedarnath Balakrishnan ,  Ravindra N. Bhargava ,  Guanhao Shen

IPC: G06F13/16 ,  G06F12/1009 ,  G11C8/12 ,  G11C11/406

Abstract: Staging memory access requests includes receiving a memory access request directed to Dynamic Random Access Memory; storing the memory access request in a staging buffer; and moving the memory access request from the staging buffer to a command queue.

公开(公告)号：US20240403065A1

公开(公告)日：2024-12-05

申请号：US18680644

申请日：2024-05-31

Applicant: Advanced Micro Devices, Inc.

Inventor： Sriram Sambamurthy ,  Indrani Paul ,  Kevin M. Brandl ,  James R. Magro ,  Zhao Hui Yu ,  Oswin E. Housty

IPC: G06F9/4401

Abstract: The disclosed device includes multiple special purpose processors that are configured to perform, in parallel, a power on transition sequence for the device, which can involve restoring a data state of components of the device using data stored in local storages of the special purpose processors. Various other methods, systems, and computer-readable media are also disclosed.

公开(公告)号：US12158827B2

公开(公告)日：2024-12-03

申请号：US18091163

申请日：2022-12-29

Applicant: Advanced Micro Devices, Inc.

Inventor： Kedarnath Balakrishnan ,  Kevin M. Brandl ,  James R. Magro

IPC: G06F11/00 ,  G06F11/14 ,  G06F11/20

Abstract: A memory controller includes a command queue, an arbiter, and a controller. The controller is responsive to a repair signal for migrating data from a failing region of a memory to a buffer, generating at least one command to perform a post-package repair operation of the failing region, and migrating the data from the buffer to a substitute region of the memory. The controller migrates the data to and from the buffer by providing migration read requests and migration write requests, respectively, to the command queue. The arbiter uses the plurality of arbitration rules for both the read migration requests and the write migration requests, and the read access requests and the write access requests.

公开(公告)号：US12038856B2

公开(公告)日：2024-07-16

申请号：US17961613

申请日：2022-10-07

Applicant: ADVANCED MICRO DEVICES, INC.

Inventor： James R. Magro ,  Kedarnath Balakrishnan ,  Brendan T. Mangan

IPC: G06F13/16 ,  G06F9/30 ,  G06F12/02 ,  G06F12/1009

CPC classification number: G06F13/1668 ,  G06F9/30043 ,  G06F12/0246 ,  G06F12/1009 ,  G06F13/1605

Abstract: A memory controller includes a memory channel controller that uses multiple groups of command queue and arbiter pairs. Each arbiter is coupled to a respective command queue to select memory access commands from each command queue according to predetermined criteria. Each arbiter selects from among the memory access requests in each command queue independently based on the predetermined criteria and sends selected memory access requests to a selector that serves as a second level arbiter which sends the request to a memory subchannel.

公开(公告)号：US11704183B2

公开(公告)日：2023-07-18

申请号：US17544074

申请日：2021-12-07

Applicant: Advanced Micro Devices, Inc.

Inventor： Kedarnath Balakrishnan ,  James R. Magro ,  Kevin Michael Lepak ,  Vilas Sridharan

IPC: G06F11/07 ,  H03M13/29 ,  G06F11/10

CPC classification number: G06F11/0772 ,  G06F11/0727 ,  G06F11/0751 ,  G06F11/1004 ,  G06F11/1068 ,  H03M13/29

Abstract: A data processor includes provides memory commands to a memory channel according to predetermined criteria. The data processor includes a first error code generation circuit, a second error code generation circuit, and a queue. The first error code generation circuit generates a first type of error code in response to data of a write request. The second error code generation circuit generates a second type of error code for the write request, the second type of error code different from the first type of error code. The queue is coupled to the first error code generation circuit and to the second error code generation circuit, for provides write commands to an interface, the write commands including the data, the first type of error code, and the second type of error code.

公开(公告)号：US20230004459A1

公开(公告)日：2023-01-05

申请号：US17864804

申请日：2022-07-14

Applicant: Advanced Micro Devices, Inc.

Inventor： James R. Magro ,  Kedarnath Balakrishnan ,  Vilas Sridharan

IPC: G06F11/07 ,  G06F3/06 ,  G06F11/14

Abstract: A memory controller includes a memory channel controller adapted to receive memory access requests and dispatch associated commands addressable in a system memory address space to a non-volatile storage class memory (SCM) module. The non-volatile error reporting circuit identifies error conditions associated with the non-volatile SCM module and maps the error conditions from a first number of possible error conditions associated with the non-volatile SCM module to a second, smaller number of virtual error types for reporting to an error monitoring module of a host operating system, the mapping based at least on a classification that the error condition will or will not have a deleterious effect on an executable process running on the host operating system.

公开(公告)号：US20220318161A1

公开(公告)日：2022-10-06

申请号：US17219273

申请日：2021-03-31

Applicant: Advanced Micro Devices, Inc.

Inventor： Kevin M. Brandl ,  Indrani Paul ,  Jean J. Chittilappilly ,  Abhishek Kumar Verma ,  James R. Magro ,  Kavyashree Pilar

IPC: G06F13/16 ,  G06F1/3234 ,  G06F1/3296 ,  G11C11/406

Abstract: A memory controller includes a command queue and an arbiter operating in a first voltage domain, and a physical layer interface (PHY) operating in a second voltage domain. The memory controller includes isolation cells operable to isolate the PHY from the first voltage domain. A local power state controller, in response to a first power state command, provides configuration and state data for storage in an on-chip RAM memory, causes the memory controller to enter a powered-down state, and maintains the PHY in a low-power state in which the second voltage domain is powered while the memory controller is in the powered-down state.

公开(公告)号：US20220091921A1

公开(公告)日：2022-03-24

申请号：US17544074

申请日：2021-12-07

Applicant: Advanced Micro Devices, Inc.

Inventor： Kedarnath Balakrishnan ,  James R. Magro ,  Kevin Michael Lepak ,  Vilas Sridharan

IPC: G06F11/07 ,  H03M13/29 ,  G06F11/10

Abstract: A data processor includes provides memory commands to a memory channel according to predetermined criteria. The data processor includes a first error code generation circuit, a second error code generation circuit, and a queue. The first error code generation circuit generates a first type of error code in response to data of a write request. The second error code generation circuit generates a second type of error code for the write request, the second type of error code different from the first type of error code. The queue is coupled to the first error code generation circuit and to the second error code generation circuit, for provides write commands to an interface, the write commands including the data, the first type of error code, and the second type of error code.

公开(公告)号：US20220028450A1

公开(公告)日：2022-01-27

申请号：US16938855

申请日：2020-07-24

Applicant: Advanced Micro Devices, Inc.

Inventor： Jing Wang ,  Kedarnath Balakrishnan ,  Kevin M. Brandl ,  James R. Magro

IPC: G11C11/406 ,  G06F1/3203 ,  G06F9/4401

Abstract: A method for performing stutter of dynamic random access memory (DRAM) where a system on a chip (SOC) initiates bursts of requests to the DRAM to fill buffers to allow the DRAM to self-refresh is disclosed. The method includes issuing, by a system management unit (SMU), a ForceZQCal command to the memory controller to initiate the stutter procedure in response to receiving a timeout request, such as an SMU ZQCal timeout request, periodically issuing a power platform threshold (PPT) request, by the SMU, to the memory controller, and sending a ForceZQCal command prior to a PPT request to ensure re-training occurs after ZQ Calibration. The ForceZQCal command issued prior to PPT request may reduce the latency of the stutter. The method may further include issuing a ForceZQCal command prior to each periodic re-training.

公开(公告)号：US11200106B2

公开(公告)日：2021-12-14

申请号：US16705913

申请日：2019-12-06

Applicant: Advanced Micro Devices, Inc.

Inventor： Kedarnath Balakrishnan ,  James R. Magro ,  Kevin Michael Lepak ,  Vilas Sridharan

IPC: G06F11/07 ,  H03M13/29 ,  G06F11/10

Abstract: A data processing system includes a memory channel, a memory coupled to the memory channel, and a data processor. The data processor is coupled to the memory channel and accesses the memory over the memory channel using a packet structure defining a plurality of commands and having corresponding address bits, data bits, and user bits. The data processor communicates with the memory over the memory channel using a first type of error code. In response to a write access request, the data processor calculates a different, second type of error code and appends each bit of the second type of error code as a corresponding one of the user bits. The memory stores the user bits in the memory in response to a write command, and transfers the user bits to the data processor in a read response packet in response to a read command.