Invention Grant
- Patent Title: Method, apparatus, and system for propagating PCIe hot reset across a non-transparent bridge on a PCIe add-in card
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Application No.: US15640524Application Date: 2017-07-01
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Publication No.: US10884758B2Publication Date: 2021-01-05
- Inventor: Georges Manuel Faure Vaquero , John Cruz Mejia , Scott M. Rider , David M. Lee
- Applicant: Intel Corporation
- Applicant Address: US CA Santa Clara
- Assignee: Intel Corporation
- Current Assignee: Intel Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Alliance IP, LLC
- Main IPC: G06F11/00
- IPC: G06F11/00 ; G06F9/4401 ; G06F11/14 ; G06F11/30 ; G06F11/07 ; G06F13/00

Abstract:
Aspects of the embodiments are directed to propagating an in-band hot reset through an add-in card compliant with a peripheral component interconnect express (PCIe) protocol. A host system can transmit an in-band hot reset to the add-in card across a link compliant with the PCIe protocol. A non-transparent bridge (NTB) on the add-in card can receive the in-band hot reset and reset configuration registers on the NTB. A system management controller can poll the NTB register values to determine that the polled configuration registers are different from expected values stored on an electrically erasable programmable random access memory (EEPROM). The SMC can signal a warm reset to a peripheral component based on the determination that the polled configuration register value is different from the expected register value.
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