Method and device for off-loading message digest calculations

A method for off-loading calculation of a data-integrity-checking value for a message received at a computer node, the method comprising:

• selecting a data-integrity-checking scheme from a specified set of schemes using an application program;
• communicating the data-integrity-checking scheme and a message selection criterion to a second program;
• and
• if the message meets the message selection criterion,
• calculating a data-integrity-checking value according to the data-integrity-checking scheme for the message using the second program;
• and
• communicating the message and the data-integrity-checking value to the application program.

A method for off-loading calculation of a data-integrity-checking value for a remote direct memory access (RDMA) transfer to a specified portion of a memory window, the method comprising:

• selecting a data-integrity-checking scheme from a specified set of schemes using an application program;
• communicating the data-integrity-checking scheme to a second program, including expected address limits;
• communicating address limits of the specified portion of the memory window to the second program after the transfer completes;
• calculating the data-integrity-checking value according to the given data-integrity-checking scheme for the specified portion of the memory window using the second program, when the remote direct memory access (RDMA) transfer occurs;
• and
• communicating the data-integrity-checking value to the application program.

A method for off-loading calculation of a data-integrity-checking value for a direct memory access transfer to a specified portion of a memory window, the method comprising:

• selecting a data-integrity-checking scheme from a specified set of schemes using an application program;
• communicating the data-integrity-checking scheme to a second program, including expected address limits;
• communicating address limits of the specified portion of the memory window to the second program after the transfer completes;
• calculating the data-integrity-checking value according to the given data-integrity-checking scheme for the specified portion of the memory window using the second program when the direct memory access transfer occurs;
• and
• communicating the data-integrity-checking value to the application program;
• wherein calculating the data-integrity-checking value using the second program includes:
• initializing a hardware resource for calculating the value and setting a data-integrity-checking value valid flag to false;
• calculating a data-integrity-checking value according to the scheme using the resource when the transfer occurs to expected address limits in the window;
• setting the data-integrity-checking value valid flag to true and setting actual-transfer address-values, when the hardware resource completes the data integrity-checking value calculation;
• reading the data-integrity-checking value valid flag and actual-transfer address-values using the second program when the application program queries the second program for the data-integrity-checking value, the query including the address limits of the specified portion of the memory window;
• and
• calculating the data-integrity-checking value over the specified portion of the memory window using the second program when at least one of the following conditions is true:
• (1) the data-integrity-checking value valid flag is false and (2) actual-transfer address-values do not match the specified portion of the memory window.

A method for off-loading calculation of a data-integrity-checking value for a direct memory access transfer to a specified portion of a memory window, the method comprising:

• selecting a data-integrity-checking scheme from a specified set of schemes using an application program;
• communicating the data-integrity-checking scheme to a second program, including expected address limits;
• communicating address limits of the specified portion of the memory window to the second program after the transfer completes;
• calculating the data-integrity-checking value according to the given data-integrity-checking scheme for the specified portion of the memory window using the second program when the direct memory access transfer occurs;
• and
• communicating the data-integrity-checking value to the application program;
• wherein communicating the scheme is performed by a bind memory window operation and wherein the data-integrity-checking value is accessible to the application program by a query memory window operation.

A device for off-loading calculation of a data-integrity-checking value for a data message, the device comprising:

• a first processor including:
• logic for selecting a data-integrity-checking scheme from a specified set of schemes using an application program, wherein each scheme of the specified set of schemes identifies a corresponding data digest type to calculate a data-integrity-checking value;
• and
• logic for communicating the data-integrity-checking scheme and the message;
• and
• a second processor including:
• logic for receiving the scheme and the data message from the first processor and calculating a data-integrity-checking value according to the scheme for the data message using a second program.

A device for off-loading calculation of a data-integrity-checking value for a message, the message received at a computer system, the device comprising:

• a first processor including:
• logic for selecting a data-integrity-checking scheme from a specified set of schemes, the logic executed by an application program, and
• logic for communicating the data-integrity-checking scheme and an identifier for the message;
• and
• a second processor including:
• logic for receiving the scheme and the message identifier from the first processor and calculating the data-integrity-checking value according to the data-integrity-checking scheme for the message, the logic executed by a second program, and
• logic for communicating the given message and the data-integrity-checking value to the first processor.

A device for off-loading calculation of a data-integrity-checking value for a direct memory access transfer to a specified portion of a memory window, the device comprising:

• a first processor including:
• logic for selecting a data-integrity-checking scheme from a specified set of schemes, the logic executed by an application program,
• logic for communicating the data-integrity-checking scheme including expected address limits, and
• logic for communicating address limits of the specified portion of the memory window after the transfer completes;
• and
• a second processor including:
• logic for receiving the scheme from the first processor, receiving the address limits of the specified portion of the address window after the transfer completes and calculating a data-integrity-checking value according to the scheme for the specified portion of the window, when the direct memory access transfer completes, the logic executed by a second program;
• and
• logic for communicating the data-integrity-checking value to the first processor.