Differentiating blade destination and traffic types in a multi-root PCIe environment

1. A method, in a data processing system, for differentiating between different traffic types comprising:

generating a first mapping data structure that, for each single-root virtual hierarchy in a plurality of single-root virtual hierarchies of the data processing system, associates each traffic class in a plurality of traffic classes with a corresponding priority group in a plurality of priority groups and a corresponding virtual channel in a plurality of virtual channels;

generating a second mapping data structure that maps each virtual channel in the plurality of virtual channels to a corresponding virtual link in a plurality of virtual links of the data processing system; and

routing traffic of a particular priority group from a single-root virtual hierarchy of the plurality of single root virtual hierarchies to a particular virtual link in the plurality of the virtual links based on the first mapping data structure and second mapping data structure, wherein each combination of a single-root virtual hierarchy of the plurality of single-root virtual hierarchy and virtual channel is mapped to a different virtual link in the plurality of virtual links, wherein routing traffic from the single-root virtual hierarchy to the particular virtual link in the plurality of the virtual links based on the first mapping data structure and second mapping data structure comprises:

determining a traffic class associated with the traffic;

performing a lookup operation in the first mapping data structure to identify a virtual channel corresponding to the particular priority group of the traffic, the priority group of the traffic corresponding to a combination of the single-root virtual hierarchy and the traffic class of the traffic;

performing a lookup operation in the second mapping data structure to identify a virtual link associated with the virtual channel and single-root virtual hierarchy of the traffic; and

routing the traffic to the identified virtual link.

2. The method of claim 1 , wherein the first mapping data structure and second mapping data structure are generated by a hardware management console of the data processing system.

3. The method of claim 2 , wherein the hardware management console configures one or more communication fabric managers of a host system based on the first mapping data structure and second mapping data structure.

4. The method of claim 1 , wherein the data processing system is a multi-root data processing system having a plurality of single-root virtual hierarchies.

5. The method of claim 4 , wherein the first mapping data structure and second mapping data structure route data from each single-root virtual hierarchy, in the plurality of single-root virtual hierarchies, to a different virtual link in the plurality of virtual links based on a combination of an identifier of the single-root virtual hierarchy and a virtual channel in a plurality of virtual channels associated with the single-root virtual hierarchy identified by the identifier.

6. The method of claim 1 , wherein, for a single-root virtual hierarchy, within the first mapping data structure, a same virtual channel corresponds to a same priority group, and wherein the same virtual channel has one or more traffic classes associated with the same virtual channel.

7. The method of claim 6 , wherein the single-root virtual hierarchy is associated with a host system blade of a blade server.

8. The method of claim 1 , wherein the method is implemented by a Peripheral Component Interconnect (PCI) Express management component of a host system blade in a blade server.

9. The method of claim 8 , wherein the PCI Express management component is one of a single-root PCI Express management component or a multi-root PCI Express management component.

10. A computer program product comprising a non-transitory computer recordable medium having a computer readable program recorded thereon, wherein the computer readable program, when executed on a data processing system, causes the data processing system to:

generate a first mapping data structure that, for each single-root virtual hierarchy in a plurality of single-root virtual hierarchies of the data processing system, associates each traffic class in a plurality of traffic classes with a corresponding priority group in a plurality of priority groups and a corresponding virtual channel in a plurality of virtual channels;

generate a second mapping data structure that maps each virtual channel in the plurality of virtual channels to a corresponding virtual link in a plurality of virtual links of the data processing system; and

route traffic of a particular priority group from a single-root virtual hierarchy of the plurality of single root virtual hierarchies to a particular virtual link in the plurality of the virtual links based on the first mapping data structure and second mapping data structure, wherein each combination of a single-root virtual hierarchy of the plurality of single-root virtual hierarchy and virtual channel is mapped to a different virtual link in the plurality of virtual links, wherein routing traffic from the single-root virtual hierarchy to the particular virtual link in the plurality of the virtual links based on the first mapping data structure and second mapping data structure comprises:

determining a traffic class associated with the traffic;

performing a lookup operation in the first mapping data structure to identify a virtual channel corresponding to the particular priority group of the traffic, the priority group of the traffic corresponding to a combination of the single-root virtual hierarchy and the traffic class of the traffic;

performing a lookup operation in the second mapping data structure to identify a virtual link associated with the virtual channel and single-root virtual hierarchy of the traffic; and

routing the traffic to the identified virtual link.

11. The computer program product of claim 10 , wherein the first mapping data structure and second mapping data structure are generated by a hardware management console of the data processing system.

12. The computer program product of claim 11 , wherein the hardware management console configures one or more communication fabric managers of a host system based on the first mapping data structure and second mapping data structure.

13. The computer program product of claim 10 , wherein the data processing system is a multi-root data processing system having a plurality of single-root virtual hierarchies.

14. The computer program product of claim 13 , wherein the first mapping data structure and second mapping data structure route data from each single-root virtual hierarchy, in the plurality of single-root virtual hierarchies, to a different virtual link in the plurality of virtual links based on a combination of an identifier of the single-root virtual hierarchy and a virtual channel in a plurality of virtual channels associated with the single-root virtual hierarchy identified by the identifier.

15. The computer program product of claim 10 , wherein, for a single-root virtual hierarchy, within the first mapping data structure, a same virtual channel corresponds to a same priority group, and wherein the same virtual channel has one or more traffic classes associated with the same virtual channel.

16. The computer program product of claim 15 , wherein the single-root virtual hierarchy is associated with a host system blade of a blade server.

17. The computer program product of claim 10 , wherein the computer readable program is executed in a Peripheral Component Interconnect (PCI) Express management component of a host system blade of a blade server.

18. A data processing system, comprising:

a hardware management console; and

a host system coupled to the hardware management console, wherein the hardware management console:

generates a first mapping data structure that, for each single-root virtual hierarchy in a plurality of single-root virtual hierarchies of the data processing system, associates each traffic class in a plurality of traffic classes with a corresponding priority group in a plurality of priority groups and a corresponding virtual channel in a plurality of virtual channels;

generates a second mapping data structure that maps each virtual channel in the plurality of virtual channels to a corresponding virtual link in a plurality of virtual links of the data processing system; and

routes traffic of a particular priority group from a single-root virtual hierarchy of the plurality of single root virtual hierarchies to a particular virtual link in the plurality of the virtual links based on the first mapping data structure and second mapping data structure, wherein each combination of a single-root virtual hierarchy of the plurality of single-root virtual hierarchy and virtual channel is mapped to a different virtual link in the plurality of virtual links, wherein routing traffic from the single-root virtual hierarchy to the particular virtual link in the plurality of the virtual links based on the first mapping data structure and second mapping data structure comprises:

determining a traffic class associated with the traffic;

performing a lookup operation in the first mapping data structure to identify a virtual channel corresponding to the particular priority group of the traffic, the priority group of the traffic corresponding to a combination of the single-root virtual hierarchy and the traffic class of the traffic;

performing a lookup operation in the second mapping data structure to identify a virtual link associated with the virtual channel and single-root virtual hierarchy of the traffic; and

routing the traffic to the identified virtual link.