Parallel mapping of client partition memory to multiple physical adapters
AssigneeInternational Business Machines Corporation
InventorsAndrew T. Koch, Kyle A. Lucke, Nicholas J. Rogness, Steven E. Royer
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Abstract
Techniques are disclosed for performing input/output (I/O) requests to two or more physical adapters in parallel. One method for performing an input/output (I/O) request includes mapping an address for at least a first page associated with a virtual I/O request to an entry in a virtual TCE table and identifying a plurality of physical adapters required to service the virtual I/O request. For each of the identified physical adapters, the entry in the virtual TCE table is mapped to an entry in a physical TCE table corresponding to the physical adapter. This method may also include, in parallel, issuing physical I/O requests to the physical adapters.
Claims7
A method for performing an input/output (I/O) request, the method comprising:
- mapping an address for at least a first page associated with a virtual I/O request to an entry in a virtual translation control entry (TCE) table;
- identifying a plurality of physical adapters required to service the virtual I/O request;
- upon determining, in at least one of the identified physical adapters, that an entry in a respective physical TCE table corresponding to the physical adapter is unavailable:
- aborting the virtual I/O request, and
- returning an error;
- and
- upon determining, in each of the identified physical adapters, that an entry in the respective physical TCE table corresponding to the physical adapter is available, for each of the identified physical adapters:
- in parallel, mapping the entry in the virtual TCE table to an entry in the respective physical TCE table corresponding to the physical adapter, and
- in parallel, issuing a physical I/O request corresponding to each physical TCE table entry to the respective physical adapter.
Dependencies are inferred from the claim text.