Electrical computers and digital data processing systems: input/ – Input/output data processing – Direct memory accessing
Reexamination Certificate
2008-12-05
2011-12-13
Tsai, Henry (Department: 2184)
Electrical computers and digital data processing systems: input/
Input/output data processing
Direct memory accessing
C710S026000, C710S052000, C710S062000, C709S212000, C711S004000
Reexamination Certificate
active
08078771
ABSTRACT:
A system for sending large Command Descriptor Block (CDB) structures in a serial attached SCSI (SAS) controller includes a CDB Transmit Block, a CDB Memory, a Context Memory, a Direct Memory Access (DMA) Queue, a Transmit DMA Engine, and a SAS Interface. The CDB Transmit Block receives one or more Message Frames. If the CDB is small (32 bytes or less), the CDB Transmit Block reads data from the Message Frame and transmits a SAS Command Frame over the SAS interface. If the CDB is large (33 bytes or more), the CDB Transmit Block places a large CDB entry into the DMA Queue. The Transmit DMA Engine receives the large CDB entry from the DMA queue, utilizes an address pointer from the Message Frame to the CDB Memory to fetch large CDB information into a DMA buffer, and transmits a SAS Command Frame over the SAS interface.
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Dawra Ajay
Day Brian A.
Kadekodi Parameshwar A.
LSI Corporation
Suiter Swantz pc llo
Sun Michael
Tsai Henry
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