Abstract: Techniques for emulating a configuration space may include emulating a set of configuration registers in an integrated circuit device for a set of functions corresponding to a type of peripheral device. The type of peripheral device represented by the integrated circuit device can be modified by changing the set of configuration registers being emulated in the integrated circuit device. Multiple sets of configuration registers can also be emulated to support different virtual machines or different operating systems.

Abstract: Apparatus and methods are disclosed herein for remote, direct memory access (RDMA) technology that enables direct memory access from one host computer memory to another host computer memory over a physical or virtual computer network according to a number of different RDMA protocols. In one example, a method includes receiving remote direct memory access (RDMA) packets via a network adapter, deriving a protocol index identifying an RDMA protocol used to encode data for an RDMA transaction associated with the RDMA packets, applying the protocol index to a generate RDMA commands from header information in at least one of the received RDMA packets, and performing an RDMA operation using the RDMA commands.

Abstract: Apparatus and methods are disclosed herein for remote, direct memory access (RDMA) technology that enables direct memory access from one host computer memory to another host computer memory over a physical or virtual computer network according to a number of different RDMA protocols. In one example, a method includes receiving remote direct memory access (RDMA) packets via a network adapter, deriving a protocol index identifying an RDMA protocol used to encode data for an RDMA transaction associated with the RDMA packets, applying the protocol index to a generate RDMA commands from header information in at least one of the received RDMA packets, and performing an RDMA operation using the RDMA commands.

Abstract: Techniques for emulating a configuration space may include emulating a set of configuration registers for a set of functions corresponding to a type of peripheral device. The set of functions can include a physical function and a virtual function associated with the physical function. A configuration access request can be processed by retrieving an emulated configuration register from the emulated configuration space, and logging incoming configuration access requests in a configuration transaction log to track configuration accesses.

Abstract: A computing system supporting reliable network communications can include a virtual machine executing a user application, and a network adapter device coupled to the virtual machine via a plurality of virtual interfaces. The user application can communicate with the network adapter device using a virtual interface assigned to the user application. Queue pairs, each including a send queue and a receive queue, can be implemented to process transmit packets being sent from the virtual machine to the network and incoming packets being sent to the virtual machine from the network.

Abstract: Apparatus and methods are disclosed herein for remote, direct memory access (RDMA) technology that enables direct memory access from one host computer memory to another host computer memory over a physical or virtual computer network. In one example, RDMA functionality is provided by combining a host executing instructions for RDMA software applications with dedicated hardware accelerator, where the host has access to substantially all RDMA connection context (e.g., configuration, status, state machine, counters, etc.) and a hardware accelerator stores a portion of the context information for a set of currently active transactions. The hardware accelerator derives a transaction identifier from header information in received RDMA packets and performs a local RDMA operation using at least a portion of the received data, a destination address of the location RDMA operation being based at least in part on a memory address determined using the transaction identifier.

Abstract: Apparatus and methods are disclosed herein for remote, direct memory access (RDMA) technology that enables direct memory access from one host computer memory to another host computer memory over a physical or virtual computer network. In one example, RDMA functionality is provided by combining a host executing instructions for RDMA software applications with dedicated hardware accelerator, where the host has access to substantially all RDMA connection context (e.g., configuration, status, state machine, counters, etc.) and a hardware accelerator stores a portion of the context information for a set of currently active transactions. The hardware accelerator derives a transaction identifier from header information in received RDMA packets and performs a local RDMA operation using at least a portion of the received data, a destination address of the location RDMA operation being based at least in part on a memory address determined using the transaction identifier.

Abstract: Provided are systems and methods for reliable, out-of-order transmission of packets. In some implementations, provided is an apparatus configured to communicate with a network and a host device. The apparatus may receive out-of-order packets from a remote device. The apparatus may transmit selective-acknowledgements to the remote device such that remote device can retransmit certain packets. The out-of-order packets can be provided to software for re-ordering.

Abstract: A packet header is received from a host and written to a header queue. A direct memory access (DMA) descriptor is received from the host and written to a packet descriptor queue. The DMA descriptor points to packet data in a host memory. The packet data is fetched from host memory and the packet header and the packet data are provided to a network interface.

Abstract: Apparatus and methods are disclosed herein for remote, direct memory access (RDMA) technology that enables direct memory access from one host computer memory to another host computer memory over a physical or virtual computer network according to a number of different RDMA protocols. In one example, a method includes receiving remote direct memory access (RDMA) packets via a network adapter, deriving a protocol index identifying an RDMA protocol used to encode data for an RDMA transaction associated with the RDMA packets, applying the protocol index to a generate RDMA commands from header information in at least one of the received RDMA packets, and performing an RDMA operation using the RDMA commands.

Abstract: Disclosed herein is a method including receiving, from a user application, data to be transmitted from a source address to a destination address using a single connection through a network; and splitting the data into a plurality of packets according to a communication protocol. For each packet of the plurality of packets, a respective flowlet for the packet to be transmitted in is determined from a plurality of flowlets. Assignment of the flowlets to the packets can be dynamically adjusted based on utilization of the flowlets.

Abstract: Disclosed herein is a method including receiving, from a user application, data to be transmitted from a source address to a destination address using a single connection through a network; and splitting the data into a plurality of packets according to a communication protocol. For each packet of the plurality of packets, a respective flowlet for the packet to be transmitted in is determined from a plurality of flowlets; a field in the packet used by a network switch of the network to route the packet is set based on the determined flowlet for the packet; and the packet is sent via the determined flowlet for transmitting through the network.

Abstract: Apparatus and methods are disclosed herein for remote, direct memory access (RDMA) technology that enables direct memory access from one host computer memory to another host computer memory over a physical or virtual computer network according to a number of different RDMA protocols. In one example, a method includes receiving remote direct memory access (RDMA) packets via a network adapter, deriving a protocol index identifying an RDMA protocol used to encode data for an RDMA transaction associated with the RDMA packets, applying the protocol index to a generate RDMA commands from header information in at least one of the received RDMA packets, and performing an RDMA operation using the RDMA commands.

Abstract: Provided are systems and methods for reliable, out-of-order transmission of packets. In some implementations, provided is an apparatus configured to communicate with a network and a host device. The apparatus may receive out-of-order packets from a remote device. The apparatus may transmit selective-acknowledgements to the remote device such that remote device can retransmit certain packets. The out-of-order packets can be provided to software for re-ordering.

Abstract: Techniques for emulating a configuration space may include emulating a set of configuration registers for a set of functions corresponding to a type of peripheral device. The set of functions can include a physical function and a virtual function associated with the physical function. A configuration access request can be processed by retrieving an emulated configuration register from the emulated configuration space, and logging incoming configuration access requests in a configuration transaction log to track configuration accesses.

Abstract: Apparatus, methods, and computer-readable storage media are disclosed for core-to-core communication between physical and/or virtual processor cores. In some examples of the disclosed technology, application cores write notification data (e.g., to doorbell or PCI configuration memory space accesses via a memory interface), without synchronizing with the other application cores or the service cores. In one examples of the disclosed technology, a message selection circuit is configured to, serialize data from the plurality of user cores by: receiving data from a user core, selecting one of the service cores to send the data based on a memory location addressed by the sending user core, and sending the received data to a respective message buffer dedicated to the selected service core.

Abstract: Provided are systems and methods for reliable, out-of-order transmission of packets. In some implementations, provided is an apparatus configured to communicate with a network and a host device. The apparatus may receive messages from the host device at a send queue, where each message includes destination information. The apparatus may further determine, using the destination information and an identify of the send queue, a transport context associated with a destination on the network. The apparatus may further, for each message and using the transport context, generate a packet including the message and transmit the packet over the network. The apparatus may further monitor status for each transmitted packet.

Abstract: Techniques for emulating a configuration space by a peripheral device may include receiving a access request, determining that the access request is for an emulated configuration space of the peripheral device, and retrieving an emulated configuration from an emulated configuration space. The access request can then be serviced by using the emulated configuration.

Abstract: A technology is described for managing network communication device software capabilities. An example method may include sending a connection request from a network communication device electronically to a service provider environment. Software capabilities for the network communication device may be verified from the service provider environment. A software capabilities modification instruction for the network communication device may be received from the service provider environment. The software capabilities of the network communication device may be modified based on the software capabilities modification instruction.

Abstract: Provided are systems and methods for a storage adapter device for communicating with network storage. In some implementations, the storage adapter device comprises a host interface. In these implementations, the host interface may be configured to communicate with a host device using a local bus protocol. In some implementations, the storage adapter device also includes a network interface. In these implementations, the network interface may communicate with a network using a network protocol. In some implementations, the storage adapter device may be configured to communicate with a remote storage device. In some implementations, the storage adapter device may also be configured to translate a request from the host interface from the local bus protocol to the network protocol. The storage adapter device may further be configured to transmit the translated request to the remote storage device.