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US 7,600,112 B2Granted
Method and system of supporting multi-plugging in X8 and X16 PCI express slots
AssigneeDell Products L.P.
InventorsMukund Purshottam Khatri, Anand Joshi, Wei Liu
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Abstract
A card having a first device and a second device is plugged into a root port having a predefined root port width. The first device is trained and the device lane width is determined. If the root port width is greater than the device lane width then the root port is dynamically configured via hardware strapping to include a predefined number of adjacent ports with each port having a lane width equal to the device lane width. The root port is reset to force training of the first device and the second device.
Claims11
An information handling system comprising:
- a processor;
- and
- a memory coupled to the processor, the memory storing a basic input output system (BIOS) which comprises:
- a detector, wherein the detector detects a first device located on a card having multiple devices, wherein the first device is capable of communicating via N lanes, N being an integer, wherein the card is electrically coupled to a root port configured as a single port having M lanes, M being an integer;
- a reconfigurer, wherein the reconfigurer reconfigures the root port from the single port to a predefined number of adjacent ports when M is greater than N;
- and
- a retrainer, wherein the retrainer forces a retraining of the card to train the multiple devices.
4 more elements
Dependencies are inferred from the claim text.