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== Overview == |
== Overview == |
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=== PRP === |
=== PRP === |
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A PRP (physical region page) is a 64-bit physical memory address. It must be DWORD aligned. A list of PRPs is used in a data transfer to specific where data is transferred from/to in memory. A PRP list is subject to the follow rules: |
A PRP (physical region page) is a 64-bit physical memory address. It must be DWORD aligned. A list of PRPs is used in a data transfer to specific, where data is transferred from/to in memory. A PRP list is subject to the follow rules: |
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* The size of the region specified by a given PRP is the minimum of: the amount of data that can be transferred without crossing a page boundary; and the amount of data remaining to be transferred. |
* The size of the region specified by a given PRP is the minimum of: the amount of data that can be transferred without crossing a page boundary; and the amount of data remaining to be transferred. |
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* Use the submission queue ID and command ID to work out which submitted command corresponds to this completion entry. |
* Use the submission queue ID and command ID to work out which submitted command corresponds to this completion entry. |
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* Update the completion queue head doorbell register. |
* Update the completion queue head doorbell register. |
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== See Also == |
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=== External Links === |
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=== Forum Threads === |
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[[Category:Storage]] |
[[Category:Storage]] |