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Autonomous mapping of protected data streams to Fibre channel frames

  • US 20080307122A1
  • Filed: 06/11/2007
  • Published: 12/11/2008
  • Est. Priority Date: 06/11/2007
  • Status: Active Grant
First Claim
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1. An apparatus for transmitting host data to a target over a frame-based communications network, comprising:

  • one or more frame transmit engines, each frame transmit engine configured fordetermining one or more addresses, byte counts and a protection scheme of the host data to be transmitted in a particular sequence of frames, a frame size of the frames to be transmitted, and one or more free frame buffers for storing the frames prior to transmission,generating and storing headers for the frames to be transmitted, andcombining the header information, data and check bytes into frames for transmission over the network; and

    a direct memory access (DMA) engine coupled to the one or more frame transmit engines and configured for reading the host data to be transmitted from host memory in accordance with the addresses and byte counts determined by a particular frame transmit engine, calculating check bytes for the host data in accordance with the protection scheme, and storing the data and check bytes into the one or more free frame buffers.

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