Abstract:
A checksum calculation, prediction and validation system includes a host system, a network interface, a reception pipeline disposed between the host system and network interface and configured to calculate an expected full checksum related to packets received in the host system and a transmission pipeline disposed between the host system and network interface and configured calculate factors related to packets for transmission on the network interface.
Abstract:
Processing of out-of-order data transfers is facilitated in computing environments that enable data to be directly transferred between a host bus adapter (or other adapter) and a system without first staging the data in hardware disposed between the host bus adapter and the system. An address to be used in the data transfer is determined, in real-time, by efficiently locating an entry in an address data structure that includes the address to be used in the data transfer.
Abstract:
Aggregation of contiguous data packets, such as contiguous I/O adapter stores, is disclosed. Commensurate with receiving data packets to be written to a memory, multiple contiguous data units of the data packets are aggregated into an aggregated data block. The aggregated data block is validated for writing to memory responsive to either the aggregated data block reaching a size which with inclusion of a next contiguous data unit in the aggregated data block would result in the aggregated data block exceeding a configurable size limit, or a next data unit of the plurality of data units to be written to memory being non-contiguous with the multiple contiguous data units.
Abstract:
Programmable hardware devices are re-programmed without system downtime. To re-program the device, the device is quiesced, state associated with the device is saved, updates are loaded, the state is restored and operations are resumed, all transparent to the system, except for a possible delay in the system.
Abstract:
The method includes creating a master copy of a header for all packets of a data transmission event, the master copy including a plurality of intact constant header information, the plurality of intact constant header information being constant for all packets of the data transmission event, storing unique header information for all packets of the data transmission event, the unique header information including information unique to at least one packet of the data transmission event, tokenizing identities of each packet of the data transmission event to create a tokenized packet ID for each packet, and indexing the stored unique header information based on the tokenizing. A computer program product for directing a computer processor to perform a method. According to the method, at packet read-time, unique header information associated with the packet is overlayed onto the master copy to create a unique packet.
Abstract:
A method of Ethernet virtualization using hardware control flow override. The method comprises providing, at a first logical entity of a first programmable logic device, control signals used for performing control-flow, selectively routing the control signals to a second programmable logic device that is external to the first programmable logic device, receiving processed control signals from the second programmable logic device, and forwarding the processed control signals to a second logic entity of the first programmable logic device.
Abstract:
A packet that represents unknown traffic for a virtual host is received. A first test is performed to ascertain whether or not a destination connection can be determined for the received packet wherein, if a destination connection can be determined, a second test is performed to ascertain whether or not one or more connection-specific resources required to send the packet to a virtual host memory corresponding to the destination connection are available. If a destination connection for the packet cannot be determined, the packet is passed to a store engine. If the one or more connection-specific resources are not available, the packet is passed to the store engine. The store engine obtains a free packet buffer from a FIFO memory. The store engine moves the packet into the free packet buffer and submits the free packet buffer to the elastic FIFO memory. A monitoring procedure is performed to detect both an availability of connection-specific resources and a presence of one or more waiting packets with a known destination connection. When (i) a destination connection with one or more waiting packets, and (ii) available connection-specific resources, are both detected, removing the packet from the local data store; allocating the one or more connection-specific resources required to send the packet to the virtual host memory corresponding to the connection destination; and writing the packet to the virtual host memory.
Abstract:
A method of Ethernet virtualization using automatic self-configuration of logic of a data router. The method comprising maintaining control parameters at a master device, accessing, by a slave device, the control parameters at the master devices, and configuring the slave device based on the accessed control parameters.
Abstract:
A method for Ethernet virtualization using assisted frame correction. The method comprises receiving at a host adapter data packets from a network, storing the received data packets in host memory, storing the received data packets in a hardware queue located on the host adapter, setting a status indicator reflecting the status of the data packets based on results of the checking, and sending the status indicator to the host memory.
Abstract:
A packet that represents unknown traffic for a virtual host is received. A first test is performed to ascertain whether or not a destination connection can be determined for the received packet wherein, if a destination connection can be determined, a second test is performed to ascertain whether or not one or more connection-specific resources required to send the packet to a virtual host memory corresponding to the destination connection are available. If a destination connection for the packet cannot be determined, the packet is passed to a store engine. If the one or more connection-specific resources are not available, the packet is passed to the store engine. The store engine obtains a free packet buffer from a FIFO memory. The store engine moves the packet into the free packet buffer and submits the free packet buffer to the elastic FIFO memory. A monitoring procedure is performed to detect both an availability of connection-specific resources and a presence of one or more waiting packets with a known destination connection. When (i) a destination connection with one or more waiting packets, and (ii) available connection-specific resources, are both detected, removing the packet from the local data store; allocating the one or more connection-specific resources required to send the packet to the virtual host memory corresponding to the connection destination; and writing the packet to the virtual host memory.