公开(公告)号：US11429503B1

公开(公告)日：2022-08-30

申请号：US16456902

申请日：2019-06-28

Applicant: Amazon Technologies, Inc.

Inventor： Noga Smith ,  Ron Diamant ,  Saar Gross

IPC: G06F11/14 ,  G06F11/30 ,  G06F13/28

Abstract: A self-detection mechanism for an IC is disclosed that determines whether the IC's internal bus is in a hanging state. An initialization sequence can be modified after a soft reset by reading data from an internal DRAM of the IC using a Direct Memory Access (DMA) controller as part of the initialization sequence. The read command is issued over the internal bus and, if the bus is hanging, the read command is not completed. Monitoring can be performed by waiting a predetermined period of time (e.g., 100 ms) to determine if the read was properly completed. If so, no further action is needed. If the read was not completed, then a hard reset is requested to be performed. Thus, an initialization sequence can be modified to run dummy transactions through the internal bus, and validate that all paths are functional.

公开(公告)号：US20220164104A1

公开(公告)日：2022-05-26

申请号：US17670342

申请日：2022-02-11

Applicant: Amazon Technologies, Inc.

Inventor： Raviprasad Venkatesha Murthy Mummidi ,  Matthew Shawn Wilson ,  Anthony Nicholas Liguori ,  Nafea Bshara ,  Saar Gross ,  Jaspal Kohli

IPC: G06F3/06 ,  G06F12/14 ,  G06F13/20 ,  G06F13/40

Abstract: A peripheral device may implement storage virtualization for non-volatile storage devices connected to the peripheral device. A host system connected to the peripheral device may host one or multiple virtual machines. The peripheral device may implement different virtual interfaces for the virtual machines or the host system that present a storage partition at a non-volatile storage device to the virtual machine or host system for storage. Access requests from the virtual machines or host system are directed to the respective virtual interface at the peripheral device. The peripheral device may perform data encryption or decryption, or may perform throttling of access requests. The peripheral device may generate and send physical access requests to perform the access requests received via the virtual interfaces to the non-volatile storage devices. Completion of the access requests may be indicated to the virtual machines via the virtual interfaces.

公开(公告)号：US20190294328A1

公开(公告)日：2019-09-26

申请号：US16435372

申请日：2019-06-07

Applicant: Amazon Technologies, Inc.

Inventor： Raviprasad Venkatesha Murthy Mummidi ,  Matthew Shawn Wilson ,  Anthony Nicholas Liguori ,  Nafea Bshara ,  Saar Gross ,  Jaspal Kohli

IPC: G06F3/06 ,  G06F12/14 ,  G06F13/40 ,  G06F13/20

Abstract: A peripheral device may implement storage virtualization for non-volatile storage devices connected to the peripheral device. A host system connected to the peripheral device may host one or multiple virtual machines. The peripheral device may implement different virtual interfaces for the virtual machines or the host system that present a storage partition at a non-volatile storage device to the virtual machine or host system for storage. Access requests from the virtual machines or host system are directed to the respective virtual interface at the peripheral device. The peripheral device may perform data encryption or decryption, or may perform throttling of access requests. The peripheral device may generate and send physical access requests to perform the access requests received via the virtual interfaces to the non-volatile storage devices. Completion of the access requests may be indicated to the virtual machines via the virtual interfaces.

公开(公告)号：US10409744B1

公开(公告)日：2019-09-10

申请号：US15251877

申请日：2016-08-30

Applicant: Amazon Technologies, Inc.

Inventor： Saar Gross ,  Said Bshara ,  Adi Habusha ,  Nafea Bshara ,  Ronen Shitrit

IPC: G06F1/32 ,  G06F13/24 ,  G06F13/42 ,  G06F1/3287 ,  G06F1/3206 ,  G06F1/3296 ,  G06F1/3293

Abstract: A processor in a peripheral device can include a wait-for-event mechanism, through which the processor can enter low-power mode and be woken from lower-power mode with an event. Using an event, rather than an interrupt, allows the processor to wake without the latency incurred by an interrupt handling routine. In various implementations, the processor may be configured to execute a sequence of instructions that include a wait-for-event instruction. The wait-for-event instruction can be called when the processor is idle. The wait-for-event instruction may initiate a low-power mode for the processor, wherein the processor suspends executing the sequence of instructions. The processor may further be configured to receive, at an event input, an event signal. The event signal may cause the processor to exit the low-power mode and to resume executing the sequence of instructions from the point at which the processor suspended executing the sequence of instructions.

公开(公告)号：US10318162B2

公开(公告)日：2019-06-11

申请号：US15279352

申请日：2016-09-28

Applicant: Amazon Technologies, Inc.

Inventor： Raviprasad Venkatesha Murthy Mummidi ,  Matthew Shawn Wilson ,  Anthony Nicholas Liguori ,  Nafea Bshara ,  Saar Gross ,  Jaspal Kohli

IPC: G06F13/00 ,  G06F3/06 ,  G06F12/14 ,  G06F13/20 ,  G06F13/40

Abstract: A peripheral device may implement storage virtualization for non-volatile storage devices connected to the peripheral device. A host system connected to the peripheral device may host one or multiple virtual machines. The peripheral device may implement different virtual interfaces for the virtual machines or the host system that present a storage partition at a non-volatile storage device to the virtual machine or host system for storage. Access requests from the virtual machines or host system are directed to the respective virtual interface at the peripheral device. The peripheral device may perform data encryption or decryption, or may perform throttling of access requests. The peripheral device may generate and send physical access requests to perform the access requests received via the virtual interfaces to the non-volatile storage devices. Completion of the access requests may be indicated to the virtual machines via the virtual interfaces.

公开(公告)号：US09612611B1

公开(公告)日：2017-04-04

申请号：US14869349

申请日：2015-09-29

Applicant: Amazon Technologies, Inc.

Inventor： Guy Nakibly ,  Usama Nassir ,  Saar Gross ,  Nafea Bshara ,  Barak Wasserstrom ,  Daniel Joseph Grey

IPC: G06F1/08

CPC classification number: G06F1/08 ,  G06F1/04 ,  G06F1/12

Abstract: In a system having a first clock domain with a first clock and a second clock domain with a second clock, the first and second clocks are monitored to determine whether one or both clocks are active. The first clock is selected to be an output clock if the first clock is active and the second clock is disabled irrespective of the clock selection signal. The second clock is selected to be the output clock if the second clock is active and the first clock is disabled irrespective of the clock selection signal. If both the first clock and the second clock are active, either the first clock or the second clock is selected according to a received clock selection signal.