Data transfer control device, integrated circuit of same, data transfer control method of same, data transfer completion notification device, integrated circuit of same, data transfer completion notification method of same, and data transfer control system

A data transfer control device included in a system in which each of a plurality of data transfer control devices reads, from a transfer control information management device, a different one of a plurality of transfer control information pieces to be read in a predetermined order, and data specified by the read transfer control information piece is transferred via a data transfer channel provided for each of the plurality of data transfer control devices, the transfer control information management device managing a position, among the predetermined order, of one of the plurality of transfer control information pieces most recently read by each of the plurality of data transfer control devices as management information, the data transfer control device comprising:

• a transfer control information read unit reading one of the transfer control information pieces to be read in the predetermined order;
• a position information hold unit holding position information indicating a position of the read transfer control information piece among the predetermined order;
• a transfer completion recognition unit recognizing completion of data transfer performed according to the read transfer control information piece;
• a position information acquisition unit acquiring position information from each of other one or more data transfer control devices included in the system;
• a positional relation determination unit determining a relation between the position indicated by the position information held by the position information hold unit and a position indicated by the acquired position information;
• and
• a management information update unit updating the management information, when the transfer completion recognition unit recognizes completion of the data transfer and the positional relation determination unit determines that the position indicated by the held position information is earlier than the position indicated by the acquired position information.

A data transfer control device included in a system in which each of a plurality of data transfer control devices reads, from a transfer control information management device, a different one of a plurality of transfer control information pieces to be read in a predetermined order, and data specified by the read transfer control information piece is transferred via a data transfer channel provided for each of the plurality of data transfer control devices, the transfer control information management device managing a position, among the predetermined order, of one of the plurality of transfer control information pieces most recently read by each of the plurality of data transfer control devices as management information, the data transfer control device comprising:

• a transfer control information read unit reading one of the transfer control information pieces to be read in the predetermined order;
• a position information hold unit holding position information indicating a position of the read transfer control information piece among the predetermined order;
• a transfer completion recognition unit recognizing completion of data transfer performed according to the read transfer control information piece;
• a flag hold unit holding a data transfer completion flag indicating whether the data transfer performed according to the read transfer control information piece is completed or not;
• and
• a flag update unit updating the data transfer completion flag when the transfer completion recognition unit recognizes completion of the data transfer.

A data transfer control integrated circuit included in a system in which each of a plurality of data transfer control integrated circuits reads, from a transfer control information management device, a different one of a plurality of transfer control information pieces to be read in a predetermined order, and data specified by the read transfer control information piece is transferred via a data transfer channel provided for each of the plurality of data transfer control integrated circuits, the transfer control information management device managing a position, among the predetermined order, of one of the plurality of transfer control information pieces most recently read by each of the plurality of data transfer control integrated circuits as management information, the data transfer control integrated circuit comprising:

• a transfer control information read unit reading one of the transfer control information pieces to be read in the predetermined order;
• a position information hold unit holding position information indicating a position of the read transfer control information piece among the predetermined order;
• a transfer completion recognition unit recognizing completion of data transfer performed according to the read transfer control information piece;
• a position information acquisition unit acquiring position information from each of other one or more data transfer control integrated circuits included in the system;
• a positional relation determination unit determining a relation between the position indicated by the position information held by the position information hold unit and a position indicated by the acquired position information;
• and
• a management information update unit updating the management information, when the transfer completion recognition unit recognizes completion of the data transfer and the positional relation determination unit determines that the position indicated by the held position information is earlier than the position indicated by the acquired position information.

A data transfer control method used in a data transfer control device included in a system in which each of a plurality of data transfer control devices reads, from a transfer control information management device, a different one of a plurality of transfer control information pieces to be read in a predetermined order, and data specified by the read transfer control information piece is transferred via a data transfer channel provided for each of the plurality of data transfer control devices, the transfer control information management device managing a position, among the predetermined order, of one of the plurality of transfer control information pieces most recently read by each of the plurality of data transfer control devices as management information, the data transfer control method comprising:

• a transfer control information read step of reading one of the transfer control information pieces to be read in the predetermined order;
• a position information hold step of holding position information indicating a position of the read transfer control information piece among the predetermined order;
• a transfer completion recognition step of recognizing completion of data transfer performed according to the read transfer control information piece;
• a position information acquisition step of acquiring position information from each of other one or more data transfer control devices included in the system;
• a positional relation determination step of determining a relation between the position indicated by the position information held by the position information hold step and a position indicated by the acquired position information;
• and
• a management information update step of updating the management information, when the transfer completion recognition step recognizes completion of the data transfer and the positional relation determination step determines that the position indicated by the held position information is earlier than the position indicated by the acquired position information.

A data transfer control system composed of (i) a data transfer control device that belongs to a group of a plurality of data transfer control devices provided for respective data transfer channels to control data transfer performed via the respective data transfer channels, reads, from a transfer control information management device holding a plurality of transfer control information pieces to be read in a predetermined order and management information for managing the predetermined order, one of the transfer control information pieces and controls data transfer performed according to the read transfer control information piece via a corresponding one of the data transfer channels, and (ii) a data transfer completion notification device that is connected to each of a plurality of data transfer control devices controlling data transfer performed in parallel via respective data transfer channels according to respective transfer control information pieces, and notifies at least one of the data transfer control devices of completion of data transfer controlled by the at least one data transfer control device, wherein

• the data transfer control device comprising:
• a transfer control information read unit reading one of the transfer control information pieces to be read in the predetermined order;
• a position information hold unit holding position information indicating a position of the read transfer control information piece among the predetermined order;
• a transfer completion recognition unit recognizing completion of data transfer performed according to the read transfer control information piece;
• a position information acquisition unit acquiring position information from each of other one or more data transfer control devices included in the system;
• a positional relation determination unit determining a relation between the position indicated by the position information held by the position information hold unit and a position indicated by the acquired position information;
• and
• a management information update unit updating the management information, when the transfer completion recognition unit recognizes completion of the data transfer and the positional relation determination unit determines that the position indicated by the held position information is earlier than the position indicated by the acquired position information, and
• the data transfer completion notification device comprising:
• a transfer completion detection unit detecting completion of at least one data transfer operation;
• and
• a transfer completion notification unit sending, when the transfer completion detection unit detects completion of the at least one data transfer operation, a transfer completion notification signal to a corresponding one of the data transfer control devices in accordance with a predetermined timing, irrespective of whether data transfer controlled by each of one or more data transfer control devices other than the corresponding data transfer control device is performed or not.