Method and system for queuing transfers of multiple non-contiguous address ranges with a single command

A method for requesting transfer of a plurality of non-contiguous address ranges in a storage device, the method comprising:

• recording for each of the plurality of non-continuous address ranges, a starting address and quantity of data to transfer, in a tagged command list;
• recording a count of the number of non-contiguous address ranges, recorded in the tagged command list, and a tagged-transfer opcode in a command, said command and said tagged command list being stored in a command table in a memory;
• and
• recording a base address for the command table in memory and an offset for the tagged command list in a command header, said command header being one of a plurality of command headers stored in a command queue.

An article of manufacture including a machine readable medium, said machine readable medium storing state and/or executable data, which when accessed by one or more machines causes said one or more machines to:

• collect a plurality of non-continuous address ranges from a corresponding plurality of transfer requests;
• record for each of the plurality of non-continuous address ranges, a starting address and quantity of data to transfer, in a tagged command list;
• record a count of the number of non-contiguous address ranges, recorded in the tagged command list, and a tagged-transfer opcode in a command, said command and said tagged command list being stored in a command table in a memory;
• and
• record a base address for the command table in memory and an offset for the tagged command list in a command header, said command header being one of a plurality of command headers stored in a command queue.

A system for requesting transfer of a plurality of non-contiguous address ranges with a single command, the system comprising:

• a one or more system processors;
• a system memory to store data and executable software;
• a storage device coupled with the system memory to receive transfer commands stored in the system memory;
• and
• an processor executable host controller interface driver stored in the system memory that when executed by the one or more system processors causes said to one or more system processors to:
• collect a plurality of non-continuous address ranges from a corresponding plurality of storage-device transfer requests;
• record for each of the plurality of non-continuous address ranges, a starting address and quantity of data to transfer, in a tagged command list;
• record a count of the number of non-contiguous address ranges, recorded in the tagged command list, and a tagged-transfer opcode in a command, said command and said tagged command list being stored in a command table in the system memory for said storage device;
• and
• record a base address for the command table in memory and an offset for the tagged command list in a command header, said command header being one of a plurality of command headers stored in a command queue.