Method and apparatus for direct virtual memory address caching
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United States of America Patent
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Jul 24, 2007
Grant Date -
N/A
app pub date -
Apr 29, 2004
filing date -
Apr 29, 2004
priority date (Note) -
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Abstract
A system including a direct virtual memory access engine configured to request that data is stored in a memory, wherein a request for the data includes a I/O virtual address, a mapping table configured to store at least one entry includes a virtual-to-physical address mapping, a cache configured to store at least one tracking data structure associated with the at least one entry, and an input/output memory management unit storing the mapping table, operatively connected to the cache and configured to provide a physical address corresponding to the I/O virtual address to the direct virtual memory access engine, wherein the virtual-to-physical address mapping is generated prior to the direct virtual memory access engine requesting that data be stored, wherein the at least one entry and the at least one tracking structure persist for at least two direct memory address requests.
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