HIGH PERFORMANCE INTERCONNECT PHYSICAL LAYER
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Abstract
A serial data link is to be adapted during initialization of the link. Adaptation of the link is to include receiving a pseudorandom binary sequence (PRBS) from a remote agent, analyzing the PRBS to identify characteristics of the data link, and generating metric data describing the characteristics.
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Citations
70 Claims
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1-50. -50. (canceled)
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51. An apparatus comprising:
a receiver processor comprising an agent to support a layered protocol stack comprising physical layer logic, link layer logic, and protocol layer logic, wherein the agent is to; receive a link layer data stream within an active link state (L0), wherein the link layer data comprises a set of flits; intermittently enter a coordination link state (L0c), wherein the coordination link state defines a L0c interval in which physical layer control; receive a control code within the L0c interval; and initiate a reset of the link based on a control code mismatch, wherein the control code mismatch is based on an identification that the control code fails to match one of a set of specified codes. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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65. A method comprising:
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receiving a link layer data stream within an active link state (L0), wherein the link layer data comprises a set of flits; intermittently entering a coordination link state (L0c), wherein the coordination link state defines a L0c interval in which physical layer control; receiving a control code within the L0c interval; and initiating a reset of the link based on a control code mismatch, wherein the control code mismatch is based on an identification that the control code fails to match one of a set of specified codes. - View Dependent Claims (66, 67)
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68. A system comprising:
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means for receiving a link layer data stream within an active link state (L0), wherein the link layer data comprises a set of flits; means for intermittently entering a coordination link state (L0c), wherein the coordination link state defines a L0c interval in which physical layer control; means for receiving a control code within the L0c interval; and means for initiating a reset of the link based on a control code mismatch, wherein the control code mismatch is based on an identification that the control code fails to match one of a set of specified codes.
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69. A system comprising:
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a first computing device; and a second computing device coupled to the first computing device by a link, wherein the second processor device comprises; link layer circuitry to receive a link layer data stream within an active link state (L0), wherein the link layer data comprises a set of flits; state machine logic to intermittently enter a coordination link state (L0c), wherein the coordination link state defines a L0c interval in which physical layer control; physical layer circuitry to; identify a control code received from the first computing device within the L0c interval; and initiate a reset of the link based on a control code mismatch, wherein the control code mismatch is based on an identification that the control code fails to match one of a set of specified codes. - View Dependent Claims (70)
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Specification