Adaptive interface storage device with multiple storage protocols including NVMe and NVMe over fabrics storage devices

1. A device comprising:

a connector for connecting to a second device, wherein the connector is configured to receive a first signal indicative of a first state from the second device, and is further configured to receive a second signal indicative of a second state from the second device;

first circuitry, wherein the first signal is configured to cause selection of first configuration instructions and the second signal is configured to cause selection of second configuration instructions, wherein the first configuration instructions are for configuring the first circuitry to operate in the first state and the second configuration instructions are for configuring the first circuitry to operate in the second state; and

second circuitry coupled to the connector, the second circuitry for causing the device to operate in the first state in response to the connector receiving the first signal from the second device, and further configured to operate in the second state in response to the connector receiving the second signal from the second device,

the device being configured:

in the first state, to present a first interface according to a first protocol at the connector, and

in the second state, to present a second interface according to a second protocol, different from the first protocol, at the connector,

wherein the second protocol is NVMe over Fabrics.

2. The device of claim 1 , further comprising:

a third circuit, wherein the second circuitry is connected to the third circuit and to the connector, wherein the second circuitry is configured to establish a first connection between the third circuit and the connector in the first state and to establish a second connection between the third circuit and the connector in the second state, and wherein the first connection and the second connection are different.

3. The device of claim 2 , wherein the third circuit includes a first peripheral component interconnect express (PCIe) endpoint and a second PCIe endpoint, and wherein the first connection connects the first PCIe endpoint to the connector, and wherein the second connection connects the first PCIe endpoint and the second PCIe endpoint to the connector.

4. The device of claim 3 , wherein the second circuitry includes a first multiplexer comprising:

a first multiplexer channel having a first multiplexer channel common port connected to the connector and

a second multiplexer channel having:

a second multiplexer channel common port connected to the connector,

a second multiplexer channel first selectable port connected to the first PCIe endpoint, and

a second multiplexer channel second selectable port connected to the second PCIe endpoint.

5. The device of claim 4 , wherein the first multiplexer channel has a first multiplexer channel first selectable port connected to the first PCIe endpoint.

6. The device of claim 5 , wherein:

the first multiplexer channel has a first multiplexer channel second selectable port, the first multiplexer channel second selectable port being distinct from the first multiplexer channel first selectable port,

in the first state, the first multiplexer channel first selectable port is selected, and

in the second state, the first multiplexer channel first selectable port is selected.

7. The device of claim 4 , wherein the first protocol is NMVe.

8. The device of claim 4 , wherein the third circuit is connected to a first plurality of conductors of the connector, and the third circuit is configured, in the second state, to present an Ethernet interface at the first plurality of conductors.

9. The device of claim 8 , wherein the second protocol is NVMe over Fabrics, over the Ethernet interface.

10. The device of claim 4 , wherein, in the first state, the second multiplexer channel first selectable port is selected.

11. The device of claim 10 , wherein, in the second state, the second multiplexer channel second selectable port is selected.

12. The device of claim 11 , wherein the device is further configured, in the second state, to present a first control plane interface at the connector.

13. The device of claim 4 , wherein:

the first PCIe endpoint is a four-lane PCIe endpoint,

the second PCIe endpoint is a four-lane PCIe endpoint, and

the second multiplexer channel common port has two input lanes and two output lanes.

14. The device of claim 2 , wherein:

the third circuit is a programmable adaptable circuit, having a configuration port, and being configured, at system startup, to load at least one of the first configuration instructions or the second configuration instructions through the configuration port;

the second circuitry includes a first multiplexer;

the first circuitry further comprises:

a first bitfile memory,

a second bitfile memory, and

a second multiplexer;

the second multiplexer has:

a second multiplexer common port connected to the configuration port,

a second multiplexer first selectable port connected to the first bitfile memory, and

a second multiplexer second selectable port connected to the second bitfile memory;

wherein, in the first state, the second multiplexer first selectable port is selected; and

in the second state, the second multiplexer second selectable port is selected.

15. The device of claim 1 , wherein the connector is a U.2 connector.

16. The device of claim 1 , further comprising a state control input configured to receive the first signal and the second signal for selecting between the first state and the second state.

17. The device of claim 16 , wherein the connector is a U.2 connector having an E6 pin, and the state control input is the E6 pin.

18. A device, comprising:

a connector for connecting to a second device, wherein the connector is configured to receive a first signal indicative of a first state from the second device, and is further configured to receive a second signal indicative of a second state from the second device;

first circuitry, wherein the first signal is configured to cause selection of first configuration instructions and the second signal is configured to cause selection of second configuration instructions, wherein the first configuration instructions are for configuring the first circuitry to operate in the first state and the second configuration instructions are for configuring the first circuitry to operate in the second state;

persistent storage; and

second circuitry coupled to the connector and the first circuitry, the second circuitry for causing the device to operate in the first state in response to the connector receiving the first signal from the second device, and further configured to operate in the second state in response to the connector receiving the second signal from the second device, the device being configured:

in the first state, to present a first interface according to a first protocol at the connector, and

in the second state, to present a second interface according to a second protocol, different from the first protocol, at the connector,

wherein the second protocol is NVMe over Fabrics.

19. A system, comprising:

a chassis; and

a device,

the device comprising:

a connector for connecting to a second device, wherein the connector is configured to receive a first signal indicative of a first state from the second device, and is further configured to receive a second signal indicative of a second state from the second device;

first circuitry, wherein the first signal is configured to cause selection of first configuration instructions and the second signal is configured to cause selection of second configuration instructions, wherein the first configuration instructions are for configuring the first circuitry to operate in the first state and the second configuration instructions are for configuring the first circuitry to operate in the second state; and

second circuitry coupled to the connector and the first circuitry, the second circuitry for causing the device to operate in the first state in response to the connector receiving the first signal from the second device, and further configured to operate in the second state in response to the connector receiving the second signal from the second device,

the device being configured:

in the first state, to present a first interface according to a first protocol at the connector, and

in the second state, to present a second interface according to a second protocol, different from the first protocol, at the connector,

wherein the second protocol is NVMe over Fabrics.

20. The system of claim 19 , wherein:

the device further comprises a state control input configured to receive the first signal and the second signal for selecting between the first state and the second state, and

the chassis is hard-wired to supply to the state control input a signal selecting the first state.