PROVIDING HIGH AVAILABILITY IN A PCI-EXPRESSTM LINK IN THE PRESENCE OF LANE FAULTS
First Claim
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1. A device, comprising:
- a plurality of transmitters, each of the plurality of transmitters to originate a transmission of information on a lane of a multi-lane, two-way differential serial link;
a plurality of receivers, each of the plurality of receivers to receive information from a lane of the link;
a failure discovery unit to detect failures at any location on the link; and
a link training unit to cause at least one lane of the link to be brought into an active state to continue the transmission of information when the failure on the link does not involve all link lanes.
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Abstract
A method, device, and system are disclosed. In one embodiment, the method comprises discovering a failure on a PCI Express interconnect, determining whether a failure override bit has been set to override the standard PCI Express Polling.Compliance state for the failure on the PCI Express interconnect, and if the failure override bit has been set, entering PCI Express Polling.Configuration state if any one lane of the interconnect successfully completes the transmitting and receiving training sequence requirements in PCI Express Polling.Active state.
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Citations
20 Claims
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1. A device, comprising:
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a plurality of transmitters, each of the plurality of transmitters to originate a transmission of information on a lane of a multi-lane, two-way differential serial link; a plurality of receivers, each of the plurality of receivers to receive information from a lane of the link; a failure discovery unit to detect failures at any location on the link; and a link training unit to cause at least one lane of the link to be brought into an active state to continue the transmission of information when the failure on the link does not involve all link lanes. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system, comprising:
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a multi-lane, two-way differential serial link; a first device coupled to the link; and a second device coupled to the link, the second device to originate a transmission of information across the link to the first device; detect a failure at any location on the link; and cause at least one lane of the link to be brought into an active state to continue the transmission of information when the failure on the link does not involve all link lanes. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method, comprising:
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discovering a failure at any location on a multi-lane, two-way differential serial link; and causing at least one lane of the link to be brought into an active state to allow the transmission of information when the failure on the link does not involve all link lanes. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification