Data integrity processing and protection techniques
First Claim
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1. A method comprising:
- storing at least one context in a cache;
intercepting an access request transmitted to a source memory device;
intercepting data transferred by the source memory device in response to the access request;
selectively retrieving a context associated with the access request from a context cache based on availability of the context in the context cache;
forming a block guard based on the associated context;
selectively processing a block guard associated with the data based in part on the formed block guard; and
transferring the data to a destination memory device.
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Abstract
Techniques to accelerate block guard processing of data by use of block guard units in a path between a source memory device and an originator of a data transfer request. The block guard unit may intercept the data transfer request and data transferred in response to the data transfer request. The block guard unit may utilize a cache to store information useful to verify block guards associated with the data.
50 Citations
21 Claims
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1. A method comprising:
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storing at least one context in a cache;
intercepting an access request transmitted to a source memory device;
intercepting data transferred by the source memory device in response to the access request;
selectively retrieving a context associated with the access request from a context cache based on availability of the context in the context cache;
forming a block guard based on the associated context;
selectively processing a block guard associated with the data based in part on the formed block guard; and
transferring the data to a destination memory device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus comprising:
a block guard unit to intercept an access request transmitted to a source memory device and to intercept a data stream transferred by the source memory device in response to processing of the access request, wherein the block guard unit comprises;
a cache to store at least one context;
a control logic to determine whether a context associated with the access request is stored in the cache and to form a block guard based on the context provided by the cache;
a lane shifter to selectively shift the first valid byte of the data stream to a zero byte lane among data lanes;
a block guard computer to receive the data stream from the lane shifter and to selectively process a block guard associated with the data stream based in part on the formed block guard; and
a multiplexer to selectively transfer the data stream and the formed block guard. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A system comprising:
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a host system comprising a processor, a memory device, and an intercommunication device;
a local memory;
a storage device communicatively coupled to receive information from the local memory and provide information to the local memory;
an I/O system communicatively coupled to the intercommunication device and to provide information transfer between the local memory and the host system, wherein the I/O system includes;
an I/O processor to initiate and sending of access requests to transfer information; and
a block guard unit to intercept an access request transmitted to a source memory device and to intercept a data stream transferred by the source memory device in response to processing of the access request, wherein the block guard unit comprises;
a cache to store at least one context;
a control logic to determine whether a context associated with the access request is stored in the cache and to form a block guard based on the context provided by the cache;
a lane shifter to selectively shift the first valid byte of the data stream to a zero byte lane among data lanes;
a block guard computer to receive the data stream from the lane shifter and to selectively process a block guard associated with the data stream based in part on the formed block guard; and
a multiplexer to selectively transfer the data stream and the formed block guard. - View Dependent Claims (19, 20, 21)
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Specification