Data transfer control device and data transfer control method

摘要

The data transfer control device of the present invention is capable of improving data transfer efficiency while discarding error data, a DMA parameter storing control unit (1112) temporarily stores parameters to a store resource; a data processing unit (1201) performs error detection processing for data that is transferred; a DMA parameter return control unit (1122) causes parameters used at transfer time of data for which the processing result in the error detection processing was an error to be returned as parameters for subsequent data transfer use from the store resource; and a completion notification delay control unit (1121), with regard to the parameters, causes the completion notification to a host system that indicates that data transfer has completed normally for each of the parameters to wait for normal completion of data transfer that uses parameters that had been set earlier than each of the first-mentioned parameters.

主权项

1. A data transfer control apparatus which is capable of accepting, during data transfer, an activation request for a subsequent data transfer and a parameter setting used for data transfer, and which processes, in a set order, a plurality of activation requests made by a host system, the data transfer control apparatus comprising:
a backup control section that temporarily backs up a plurality of parameters in a backup resource; a data processing section that performs an error detection process on transferred data; a restoration control section that restores, from the backup resource and as a parameter for subsequent data transfers, a parameter used to transfer data for which the processing result of the error detection process is an error; and a completion notification control section that withholds a completion notification to the host system indicating, with respect to the plurality of parameters, that a data transfer using each parameter has been completed successfully, the completion notification being withheld until a data transfer using a parameter for which the set order precedes that of the each parameter is completed successfully, wherein the parameter includes information indicating whether the error detection process has been carried out on data transferred using the parameter.